(unsure where to post) Help with CPU - PC Related.

[webmany]

Depends on the motherboard in your current system.  It might work.

[webmany]

Here is what will fit in the socket (thanks to wikipedia):
AMD Athlon (650 MHz - 1400 MHz)
AMD Athlon XP (1500+ - 3200+)
AMD Duron (600 MHz - 1800 MHz)
AMD Sempron (2000+ - 3300+)
AMD Athlon MP (1000 MHz - 3000+)
AMD Geode NX (667 MHz - 2200 MHz)

Anything else will need a new motherboard.  Also, you will need to check with who made your motherboard (eg asus) to see if the chip is supported.  May need a bios update for some, while others will not be supported.

[webmany]

Not sure what you mean.  If you mean, will it work using WInUAE, or something else, it will work fine.