P.S.: But when i bought the HD5450, not so long ago, when my G210 started to crash frequently, i already had 10.7.5 on my rig and used the method i linked: i guarantee it works with 10.7.5 by first hand experience. You are either using the files the author of the method linked (never do that!) or are using the device ID the author of the method used, which isn't necessarily the same of your card! Mine, for instance, is 0x68F91002: check yours and inject it correctly. Rebuild caches afterwards and boot with -f.
All the best!
and finally, after many weeks I configured my hackintosh fully works, thanks everbody for the tips.
I installed again combo 10.7.5 and edited kext manually works (your advice) and I can boot i386 and GrEn=Yes and Graphics Acceleration works properly. I installed also VoodoHDA and I can get from Z5500 DTS sound through SPDIF. It's awesome.
Some minor problems waiting for me:
1.) Sound come stuttering first 2-3 seconds. It's nor a big deal for music but when I make forward or pause on videos it's disturbing. Have you got guys small tipps for it?
2.) My LCD TV works 720p, but for 1:1 Pixelmapping I have to force it work with 1366*768. Is there any advice for it, too
again thanks and greetings everybody