Here's a simpler way for Windows XP.....
1.) Open up Strife's Chams....
2.) Load the chams up...
3.) click the combat arms launcher...
4.) Click start game and try draggin Strife's loader some where in a cornor right when u press Start combat arms...
5.) Hack shield should come up,,....
6). U should get this error... DONT press ok on it, leave it...
7.) it takes maybe 20-40 seconds for the game to load..