XP 32 bit much easier to install driver but it shows only 3 GB out of 4 GB ram installed.  the so called 3 GB barrier as the additional 1GB reserved for system.

XP 64 is able to show all 4 GB ram available

realtek audio driver install stalled asking me to update Microsoft audio bus driver.  another hurdle.  found some UAA cab file but did not know how to install or update audio codec in dev mgr.  

read some more on the internet.  realized I have XP 64 SP1 installed.  found official XP 64 SP2 iso which downloads fast and burn on CD.  SP2 directly installs on XP 64.  this enabled realtek audio smooth install.  but I get some strange distortion of sound of Win XP shut down.  did not have this w XP 32.

"but I get some strange distortion of sound of Win XP shut down"  You mean when you shut down?  Is system sounds turned off?

my other 530 has no distortion.  so must be something old on this V200.  I did not recall the issue with XP 32 on the same mobo