Would flashing the BIOS with a new one be easier? If so how?
Well considering resetting the CMOS requires jumping pins or pulling out a battery which could never really render your computer useless whereas a bad BIOS flash can....then by all means resetting the CMOS would be easier.
The battery should simply pop out. They have to be held in there somewhat tight but I've never come across a battery you absolutely couldn't remove. That would be a very critical design flaw.
You need a BIOS flash utility, a floppy, and the new BIOS.
In goes floppy ( if for whatever reason the boot sequence is set to HD first and not floppy you're kind of screwed being that you cant change the sequence )
Once in dos prompt, you run the BIOS flash utility, it'll ask you for the name of the new BIOS, type it, hit enter, you're off.
Any power downs during the process = brand new paperweight.