Ian,
WOW way cool, do you know how many frustrating hours I have tried this using Loaded V4 (and other versions) I also wanted to have the quantity on the new products and specials pages but found they all use a different method (ie they don't all use POST some are HTTP urls hard coded with product etc.
I had almost given up ever getting it to work correctly.
There were no answers to my question when asked in November 2002 or so, so I thought no one would ever do it. I did find someone who used weight (or another field) to do it.
How did you do it?
Cheers
PS There is another person in this discussion with the same avatar as me - how disturbing, I thought I was going MAD!!!!