Well, it isn't that difficult to understand, PIE shouldn't exceed a value of 280, PIF's shouldn't exceed 4 per block. Beta and Jitter values should be stable (-5,0% ~ +10%) in order to avoid a skipping and freezing disc.
You are sure that you had a Ricoh dye as a Ritek labeled media? Well, I don't buy Ritek, but this sounds unusual to me since both are competitors and share the same markets. Anyways as long as it works out for you there is no need to discuss about media dyes.
I am sorry to hear that, I never had such a problem and I flashed my drive pretty often. I guess you haven't flashed with a disc inside or with AnyDVD active (the latter shouldn't be a problem)? That might happen pretty often when you're flashing in a hurry or something like this.
Your drive is still recognized in BIOS/Windows? Does it still support CD-Rs? Which media type are you using? Maybe its write strategy got replaced by another one?
What you could try as one of the last options is using Binflash to dump the old firmware and flash a new binary file.
Use this tool with care, but if the drive is really dead there is not that much left to loose, unfortunately. If you can't log-in at cdfreaks and would like to seek assistance without a new registration, simply use BugMeNot. A useful resource for different tasks.
I hope you get your drive working again.