Video & Audio Software/Drivers

Hello,
My system (desk top) was slow, I tried to re-format it but could not find the original CDs (particularly the Restore Plus! and O/S) that came with it and so I installed windows XP professional afresh. Now I could get back my drivers. Please help me to bring the system back to original settings. I need it urgently, please.
Thank you and God bless you.
model - hp compaq dx2000MT
s/n - SGH6200LON
p/n - PG984AV