Okay. I'm installing now. :-)
Question about that, by the way: as I am installing, a warning comes up, saying, "The following files in the module are being replaced by files in the hak's erfs. This may cause the module to not run properly." I always ignore that warning and click continue. Am I doing things right?
Also, do I need to import prc_ocfix.erf again once I install 3.5beta2?
Either way... good news! It works. Sudden extend now appears in my list.