Thinkpad 600 upgrade (cpu + ?) questions

[jsuebersax]

I'm thinking about upgrading my TP 600 and have these questions:

1. Is adding a PIII 850MHz cpu easy? Do I just swap chips? Any issues to consider?
2. Would a PIII cause any heating concerns?
3. Any problem with buying used PIII cpu? (If it fails, I'm just out $10, right?)
4. Will this have any major benefit on performance (improve web browsing, better for Windows XP)?
5. Aside from maybe adding a DVD player, are there any other fairly common, obvious, or cost-effective upgrades?

Thanks in advance for any suggestions!

[virge]

I think all the 600 models used MMC-1 CPU modules. MMC-2 were used in the 600E and 600X. IF your machine uses MMC-1, then the most you would be able to do is an upgrade to 400Mhz.

[Neil]

...major benefit on performance (improve web browsing, better for Windows XP)? ...any other fairly common, obvious, or cost-effective upgrades?

Don't know what kind of HDD you are running, but a larger cap., faster drive would make some dif. But IMHO, the most effective upgrades you could make are not hardware at all (you are nearly maxed out there already). You just don't have the system resources to run XP quickly. Win98SE with KernelEX is a quick OS for that machine, or Puppy Linux 5.0 is awesome. My personal favorite though would be CrunchBang Linux, that's what I'm running on one of my 600X machines (Win98SE on the other).