SOUND DRIVERS AND WINDOWS XP SP2 & SP3 AVAILABILITY

Hi
I am using a Micromaxx laptop and all had been well until it crashed. I was initially using Windows XP SP3 and I decided to continue using it. The problem is when I install it, my computer don't produce any sound, but when I install Windows XP SP2 it produces sound. I have searched for micromaxx website for sound drivers over the internet but in vain. What can I do, i want to continue using the sp3 but with sound. Anybody with a clue on how I can get alternative drivers or what can I do?
Thanks
