I was wondering if someone could tell me of a way to make a unit that acts like a land transport vehicle.

It would be able to load up units and have 3-4 moves, only able to defend and have a low strength level.

If destroyed, it would be destroyed and the units inside would suffer collateral damage. a penalty may be applied for direct attack off of the unit (for balance) and maybe a promotion could be made to offset this (like amphibious)

If anyone could help me that would be great!

this has been done before a couple months ago, search the forums.

The same way you make a naval transport, only on land :p. I think there's a tag in XML that says how many units it can carry. Make the rest of the unit and then set that. If you don't know how to make a unit, there's plenty of tutorials in this sub-forum: http://forums.civfanatics.com/forumdisplay.php?f=177