hey no prob you gotta start somewhere
just turn on the computer with no disc in, make sure the thing works. it will say "no operating system" or something of that sort but thats to be expected. when you are doing this you can power it off at anytime, it's not sensitive to being "shut down", it's jsut the bios at work. you can hit a key at boot up to enter the bios (del or something else, it will say it onscreen "press X to enter setup". setup=bios.
when you confirm that it actually boots and works, boot it up and put in the windows cd right away, before it gets past the memory check and POST, and it should boot from the cd. if not, you might have to mess with the bios under the "boot" section, make sure your cdrom drive is set to boot before your hard drive.
it will boot from the XP cd and it will be pretty straightforward from there.
oh and btw with XP you really dont need to install mobo drivers so you can probably cross that off your list. it should detect and install most drivers for you, so it is optional if you want to upgrade to newest drivers, you should be fine though. but if you're using a VIA chipset then leave the 4in1's alone for now because people seem to have lots of probs using the non-XP-default drivers.