Well, from what I hear, XP Home is the least trusted OS for *** nowadays,
but it should workout fine for you if you get all your drivers in order. I
just built a box myself too and the drivers that came with my "brand new"
fancy shmancy video card were 3 months out of date and did need replacing
when I installed it.
I would try to find out which drivers are being reported for your sound card
and would then check out SB's site to make absolutely sure that you have the
latest XP Home drivers from the SB website. You should be able to find them
in the hardware section under sound or possibly if dxdiag works in XP, it
should list all your multimedia concerned hardware (sound card, video card)
and their drivers all in one place.
I can't really help you with mobo drivers as your system appears to be Intel
based and the last 7 or 8 years has found me building my own AMD machines.
Sometimes, mobo drivers can be the issue (since that is where everything
plugs in ultimately) but I know nothing of P4-based boards or their drivers,
sorry. I just built up an AMD 2800+ on an Nvidia based mobo and once I got
all the drivers up to date everything is fine. The sound is built-in on this
board and it is the first mobo-based soundcard that has worked properly for
me in sims. The video card (GF FX 5600 Ultra 128MB) took about 2 days to
find the 'best' driver for. The latest wasn't as fast as one that was about
a month older. You have to tinker to get the best performance out of these
rascals.
Good luck with it.