I may did not give you enough information or something since no one seems to know anything
But i just wanted to let you know that I found out that you need "pec wrapper" for ePSXe Version 1.7 and 1.8. At least thats what I read.
So I tried this one as well and it really appeared in the GPU section and I can select it - but thats it. Pec is still not sending anything to ePSXe.
I did several tries with different versions but nothing worked.
So I ended up reinstalling everything without any pec stuff.
Guess someone can close this one now since I?ll just play good old non-cheat style now