Patch 1.09 problem fixed now to help with your mod.
OK 1st do this: Put GLM1.8.big and GLM1.8_1.8SKUDEF in ''C:\Documents and Settings\username\My Documents\Command & Conquer 3 Tiberium Wars\Mods''
when you finished 1st part continue to next 2nd
2nd: Go to your Start Menu on your computer > Then to Programs >Go to Electronic Arts > C&C 3 Tiberium Wars> C&C Tiberium Wars Control Center. Then the control center should pop up. > Then hit browse and you'll see a Mods tab at the top. Choose your Mod and hit the Launch Game Button. Hope this helps.