Will bootcamp work on Zephyroth's 10.5.2?

not for amd users..yet all things seem to be possible, with time..

Unfortunately, no, =(

Um, what are you talking about?

Bootcamp is
a) a firmware update that provides bios emulation for apple computers
b) a tool that helps you partition your harddrive
c) a set of drivers for windows to use all the apple hardware

since your talking about Zephyroth's, which is basically used for non-apple computers
a) most should have a bios anyway or then you should check with your board's manufacturer
b) partitioning is probably better done with a more capable tool
c) you don't need the drivers since you have other hardware anyway

... or are you talking about running virtualization like Parallels or VMWare?
Though they don't have anything directly to do with Bootcamp.

unfortunately? I don´t understand because you can run windows natively

The only "cool" thing about Boot Camp for us is holding ALT on startup and a menu appears. That's all ;-)

Again, Boot Camp is not a single software but a marketing term to describe intel mac's ability to run windows.
This aspect is based on the hardware, firmware and drivers of intel macs and has little to do with OSX.

If you want to get a prompt at bootup to choose the OS, look at the different tutorials to set up a bootloader. They don't only come in the text-only fashion but there are also ones with a pretty UI.

@Adrian: Can you suggest me a nice bootloader for XP/OSx86 with a customizable UI? (I don't want to install Linux for Grub)

Lol, that makes sense. Use EasyBCD, that's all there is to it.

Okay, I experienced, that I've got no chance for a Bootloader with my GUID-HDD ... ;-)