There some move information on the plugin
All the information below comes from http://www.minecraftwiki.net/wiki/Bukkit/TrainCarts/Signs
Train sign and redstone circuit
A first glance at the sign format
You can use signs to perform special actions with trains. All these signs have [train] or [cart] on the first line and require redstone power to function. If you want to invert the redstone power, this way not requiring any external redstone power at all, you can put an exclamation mark in front of train or cart: [!train] [!cart].
When [train] is used, the sign targets the entire train above this sign. When [cart] is used, the sign targets only the cart that is currently above this sign.
Certain signs toggle a lever as well, you can use this output to change the outcome of other signs. For example, you can combine an unpowered track switcher with a destroy sign to remove carts or trains with certain characteristics.
Each sign targets a certain track piece above. Signs attached to walls take the block they are attached to and look up until they find a piece of track. That track is then used for that sign. Sign posts look up until they find a piece of track. There may not be blocks without signs between the bottom sign and the tracks.
You can make a pillar of blocks below a single track piece and attach signs to it, to make a bundle of actions on a single track piece. Trains look down when they enter a new track piece to check for signs, so make sure you put the output signs above the signs that use this output for correct results.
The train has to face the text on the sign to make the sign respond
Signs with the same alignment as the tracks (faces to or away from the tracks) always respond
The train is spawned in the direction the sign faces
Destination signs map destinations under a name, which are used in the path finding logic. When a train tries to reach a certain destination and it has this name set, the plugin knows what tracks to switch. Other than a marker, it can also set a new destination on the train when clicked, powered by redstone or when a train enters the sign.
The trigger sign is used for graphical uses only. It works with SignLink to show train information on signs. It can also show a countdown of the time remaining for the train to arrive at a station, and comes with an internal stopwatch to measure this duration.
The train spawner sign allows you to spawn complete trains up to 30 carts long. Trains are spawned to the text-side of the sign on the rails above. When it receives power while it was unpowered before, it will trace down the tracks and spawn a train on it if there are no other trains occupying the rails.
The teleporter sign can teleport trains large distances and between worlds. It uses the MyWorlds portal as the sign, which has to be placed underneath the tracks like all other signs. It requires redstone power for it to teleport the train at all. All permissions of MyWorlds are taken into account and players that are not allowed to enter the world or portal will get ejected as the train vanishes. Trains are teleported into the direction the sign faces.
The crafter sign is very similar to the transfer signs, but this time it interacts with a nearby workbench. You can define the items to craft on the sign, and the plugin will automatically find out the right recipe to craft that item using items inside the storage minecart. It can craft multiple items at a time.
TrainCarts allows you to transfer items from carts to blocks and the other way around. For example, if you want to pick up items from a chest or want to put items back into a chest. This is called 'item transferring', it is done through a single sign.
It can target chests, furnaces and dispensers, also multiple at once. There are several syntax rules active for this sign.
Detector signs are very similar to switcher signs, only difference being that:
They do not switch the tracks
They detect multiple tracks
You can use detector signs to detect certain trains on a very long piece of track. You can use it, for example, to stop spawning trains if the track is currently in use. You can also use it to make trains take alternative routes if a certain track is in use.
Switcher signs are the linking factor between trains and signs. It can read information from the train or cart above and toggle a lever and rails based on that. It also marks the toggleable nodes of the path finding logic.
Property signs can perform the same tasks as you can do through commands, but then automated. They require redstone power to function and ignore cart ownership, so if you only want it to target trains you own, combine it with a switcher sign checking for owners.
Stations are used to stop and launch trains, optionally using a set delay in seconds. It can use redstone to set the direction to launch to, but when both sides are powered it can perform an automated action.
The blocker sign allows you to block trains coming from a certain direction. It is also used during path finding to block certain routes from being used. For example, if your trains are getting sent into the wrong direction, possibly colliding with other trains, you can use the blocker sign to prevent this.
The sign needs to be powered for it to function. It does not have to be powered for it to be used during path finding. It operates on both flat and ramped rails, so it allows you to stop a train while it slides down a ramp. Players can not push the train past the blocker sign, but they can push it the other way since that direction is not blocked.
Therefore blocker signs do not indefinitely freeze the train until power is removed, you can still push it in the other direction.
The ejector sign can eject (let exit) passengers of minecarts. You can place it at a station to eject the entire train in one go, or do it for carts individually.