Yep. After I tried the file P2BXA_B6.Bin, which ran w/out changes to B3 version or at least didn't recognize the new processor, I ran a second file BXA_B7.BIN and it DID tell me that it was not for my motherboard. I flashed it anyway. Now, I'm looking for a way to restore the previous B3 version from backup. Luckily, I backed-up the previous BIOS to backup.bin file on floppy. By the way, I'm writing this from my laptop, since as you probably know, PC no longer boots-up.
You're right. No change on the memory recognition. Still, 128MBPC100 chip was more expensive than 256MB PC133ONLY so I guess if I ever upgrade motherboard, and now seems like as good a time as any, I can always use it later.
MoBo is Superpower SP-P2BXA #2A69KSMAC, i440BX chipset SUPPOSED to recognize P-III processor. If you have any other suggestions once I get the old BIOS version running, I will give it a try. As widely posted in this website, ONLY THOSE WHO DO NOTHING, MAKE NO MISTAKES. Another learning opportunity... I REALLY appreciate your help, NickS