[expert] Mandrake + Xfree 4.01 Problem!!!

[TriOptimum]

I would like to install the xfree 4.01 i download on my Linux Mandrake 7.1.. my question is.. is it easy to install it over the xfree4.0??? And what i have to backup to be sure that if something goes wrong i can replace the old xfree without problems? And last question because Linux Mandrake has some different named dirs than default Linux.. Should i change or rename something before trying to install the xfree 4.01.. have anyone tried it yet? Any advice for me?