For those interested in forcing a BSOD on your XP:
1. Start > Run > Regedit
2. Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\i8042prt\Parameters.
3. Go to Edit > New > DWORD Value and name the new value CrashOnCtrlScroll.
4. Double-click the CrashOnCtrlScroll DWORD Value, type 1 in the Value Data textbox, and click OK.
5. Close the Registry Editor and restart Windows XP.
Once restarted, hold the [RIGHT CTRL] key and press [Scroll Lock] twice. Viola, BSOD. Make sure you enable the BSOD, My Computer > Advanced > Startup and Recovery > Settings. Uncheck automatically restart.
To those worried about the garbage along with XP and possibly touching the OS X stuff, you are way too worried about the alarmists view. Think about it, most of the viruses today are meant to hijack your computer and used as zombies. Viruses that are destructive have no purpose for virus writers because it provides no finanical benefit. Even if there was a virus that got out, first there would be a XP exploit to get it installed on your computer (assuming you are practicing safe computing). Then it would have to be so specific that it absolutely destroys the boot sequenece (I'm iffy on this part, but something along this line). Even a rootkit XP hybrid with the possibilty of going to OS X. But remember, when modifying OS X critical system items, it requires a password. So, you pretty much have to be one silly computing user to infected, and pretty bad. You have a bigger chance of Microsoft coming out with something innovative, than this happening to you.
I'll say this once, there is no cure for human stupidity. Practice safe computing and you will be fine.