update bios? A22m

[pottzie]

I've got an A22m (that somehow seems to fall into the A21 system since it's a type 26280.) I came across thinkwiki.org and since I'm running linux, I started checking it out.
One section was about bios upgrades. My thought is, "How do I know if it would be better without trying it?" And that's the problem! What I have now works, but what if it would work better with an upgrade? How do I know, and what happens if it doesn't?! I don't want to turn it into a flower pot.
Any advice?
The reason I found it is that I'm trying to get a dial up modem working so I can get to the 'net while I'm at work. Any help on that would be appreciated too.