Ahh..
Well, I just wanted to make sure then that when you downloaded the file, you un-RAR'd it (sorry, have to ask, I remember some people would just rename the download without extracting it).
If you did unRAR it, then good.
The RUU is the ROMUpdateUtility - basically, it's the ROM upgrader that you run from Windows - it handles everything. Many ROMs are packaged with it - you simply run that from within Windows, and it will do the rest (restart phone, flash ROM, etc...).
Did you have any other non-stock ROM on your phone prior to the incident? Or was flashing OliPro your first step? If it was your first step, then let's jump ahead...
Even if you don't want this ROM, I just downloaded it and know it comes with an RUU - so download it, extract it, and run the ROMUpdateUtility.exe file you see. Make sure your phone is connected via USB (oh, have you checked to make sure the cable is good - try another if you have one). If the ROM flashes, then at least we know everything is good - report back.
Download Mattsm 21887 ROM
SORRY - BEWARE - IF YOU FLASH, YOU WILL LOSE EVERYTHING ON THE PHONE (disclaimer). If you need to try to recover what you have, then we need to try to get you out of the bootloader... Let me know what you're going to try for (reflash or recover).