is it possible to install beryl or compiz on fc5?
 

i serched but didn't find any info about it for fc5

I don't know, but then don't know why not. That is if FC5 will handle the video card that can use compiz and beryl then those tools should work. Providing I guess your kernel is at least as high as either of those might require. If they come in an RPM or other suitable package it should work. And you should have Sax2 or another hardware configuration tool as well that is high enough to recognize 3d hardware when you have it.