I keep useful scripts for working with ROI_PAC here. Put them on your computer with:
git clone https://github.com/scottyhq/insar_scripts
I have a web page with more indepth notes for certain procedures. I don't forsee updating it regularly, but there currently instructions for installing ROI_PAC on MacOSX and installing MDX software... among a few other things.
There are several user-contributed wiki pages that have lots of information on InSAR and ROI_PAC.