The BIOS listed an extra two voltage options for the CPU after I flashed it.
At least it wasn't as bad as my P2B-L: it came with 1002 which came out before the Celeron did. Wouldn't boot because it didn't know the processor. I had to go back to where I bought it from to get them to flash it up (with a PII :-). And then when I added a PIII 500, I had to flash it again so it would (again) recognise the processor.
Wade.