Here my question, I know you need to use rsr files for PC's, but if I use a macintosh computer do I need to keep ".rsr" files or can I just delete them?

Attached Link: http://www.soft-rabbit.com/

RSR files are a way for Windows users to get around the Mac's resource fork (I'm a Windowser myself, so forgive me if the details aren't correct). If you're trying to install a Poser file that was made on Windows, your easiest route is to use MartinC's Maconverter from the link.

I've deleted most of my .rsr's. Poser 5 and 6 use PNG's although I'm uncertain what the Mac version uses? (I assume also png's).

Usually I will get poser files like cr2's and pz2's which have png's and rsr files. So I guess from what starmage said I should be able to just delete all the rsr files since they are just redundant files for PC users. Thanks for the help guys.

Well if you have both .rsr and .png files you should be able to delete the rsr's without an issue. beleive these are the thumbnail images for the Library for Poser 4, ProPack. In the ones I don't have png files I still have the rsr's. But I am using the PC version of Poser 6. I would double check about the Mac version. Of course if you still have the archived version of the stuff you want to delete you can always try deleting the rsr's and if you have problems reinstall it.