Quote - i have a hope that i can use some of my poser5 runtime libraries in poser7. The sad thing is that some use pz2 and rsr with no png. is there any chance i can easily get pictures for these?

Just add the P5 Runtime as an external for P7.
The RSRs will be converted to PNGs when you visit the folder for the first time (just as they were in P5).