I’ve been able to borrow a Gateway USB keyboard that is used for PC Windows, however I wanted to know if the same procedure can be accomplished with this keyboard as well?
What would be the equivalent keys to hold down for the Command Option-P-R that I would do on a iMac OSX keyboard?
iMac, Mac OS X (10.7.5), CD & DVD Inop
Welcome to Apple Support Communities, vernestfromvisalia!
It looks like you need to reset your iMac's NVRAM and had to borrow a keyboard to do so. I'll be glad to give you the information you need.
Since you need to interpret a Windows keyboard to Mac commands, this is what I found: Keyboard mappings using a PC keyboard on a Macintosh
Take care!
NVRAM Reset
