You don't want all of Darth Mod as that is a major mod you just want his formations mod.

Go to http://www.twcenter.net/forums/showthread.php?t=62465 and you can use the link at the bottom I think or you can find it on FileFront if you search for total war and dig around a little.

Sinuhets formation mod is also at twcenter at http://www.twcenter.net/forums/forumdisplay.php?f=130 the current version is in a sticky on this forum.