Upgraded from XP Home to Pro and wiped out my realtek HD audio driver.

Have tried Realtek, Asus, and HP, but 'no go'.
My Motherboard is an Asustek PTGD-LA made for HP who named it Goldfish3-GL8E.
version Onx1121RE101GOLD300
Intel Chipset i915p/ i915g rev B1. Socket 775.
Southbridge model 82801 (ICH6) rev 3
Bar code label on MB. C59S075 - 01807 - 60 - MBLDH6 - AD4. Which does not sync with the- AMIBios Bios version 3.25
HP Pavilion a1220n running XP Pro SP3
Have tried many options... from Asus, telling me to go to HP, tells me to go to Microsoft, Blaa, Blaa,
None of the many options have given me back my sound.
MS Hotfixes were for older versions w SP1/SP2.
Microsoft hotfixes not for this version.
Asus downloads say go to HP or give error '0001'.
HP downloads say go to Microsoft hotfix first.
Realtek downloads almost go on but stops and goes blank.
wdm r124.exe ??? Could not verify if this was for me.
Can Anyone
HEP me Please?

('L' missing deliberately)
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows XP Professional, Service Pack 3, 32 bit
Processor: Intel(R) Pentium(R) 4 CPU 2.93GHz, x86 Family 15 Model 4 Stepping 1
Processor Count: 1
RAM: 2551 Mb
Graphics Card:
Hard Drives: C: Total - 190771 MB, Free - 171645 MB;
Motherboard: ASUSTeK Computer INC., Goldfish3
Antivirus: Avanquest SystemSuite, Updated: Yes, On-Demand Scanner: Enabled