confused on xp SP3 problems, advice ???

[10-Dee-Q]

hi, i want to install win XP to my MBP on boot camp
actually i have installed vista 64 but, there's a lot of incompatible driver for it for my devices, eg Blackberry, and other phone.
anyway
i've heard several problem regarding XP SP3 problem on bootcamp, so before i take a jump i just want to make sure.
since my OS is 10.5.6
so i guess my bootcamp version is already on 2.1 ( mine is unibody MBP purchased on this december).

should i buy XP SP2 and after that upgrade it online to SP 3 ?

or

Should i just install XP SP3 straight away ?

thx for any help,
it's really appreciated.

 

[Amdahl]

Straight to SP3.

 

[RITZFit]

i don't know if they've updated the version of boot camp that comes w/ leopard now but before, you HAD to start out w/ sp2, then install a boot camp update from apple, within windows os. only then could sp3 be use; otherwise you would get a space unavailable error. unless your sure you already have version 2.1, just do it w/ sp2