We just got this in from Lirpa Loof, who tells us that the Shell Player for XP DOES INDEED have a volume thingy-ma-bob, contary to popular belief.
Shown below are two screenies of the volume control on the Shell Player in action and Lirpa commenting on her finds... See for yourself.
"OK, I had to unlock the taskbar and move it over a bit, but I found it, phew"
"When I clicked it, this slider thingy popped up, I almost wet myself!"