Yes you can. XP is the next updated OP after ME, or Windows 2000. Youll have to update some things using the windows updater, but windows XP should upgrade easy and clean.
You can't install XP "into" Windows 2000. You can, however, install XP over it, thereby reformatting the disk and erasing Win2K. You can also set up a dual-boot setup and have both operating systems...
1 go to www.download.com
2 type pspwxp
3 click download next to the one that say pspwxp 1.20
4 right click on the zip to extrac it
5 (please read the read me file)
6 plug you psp by using a usb...
If the PC satisfies requirements for Windows XP, the answer is yes. Here you can find all ewquired inforamtion http://www.Microsoft.com/windowsxp/pro/evaluation/sysreqs.mspx
The simple answer is both are based on similar code base, but one is made for business (W2k), and the other for main stream (XP). Windows XP SP2 AND WINDOWS 2000 SP4 are the standard minimum versions...