Coding Units in, Vary confused 8( Options

[Frostyarmy]

i was Searching on a Site called Sleiphnirs Stuff and a Found a bunch of units i planned to use them but when i downloaded them it Just gave me the Texture files and W3d Files and i really am Clueless when it comes to Getting a Total Clean slate and trying to code a Unit in , is there a site that can help with this if i could figure out how to code these in personaly , (and im aiming at the Object Folder where the basis of the codes for the unit is like what the bones do and stuff)

This is the unit i tryed to put in ,

http://www.sleipnirstuff.com/forum/download.php?id=18421

it was a USA Mammoth tank

Any help would be useful