Attribute sizes with different in-stock numbers

[Tcat]

Recently switched from Oscommerse to Zen Cart (v1.3.9h)
and have been having a heck of a time starting over from scratch. It's been a while since I've done this, but I remember the basics pretty well... the only thing is trying to remember how to make/link Products Quantity with the different attribute for the drop down menus (IE: XL T-shirt - 6 in stock. Large T-shirt - 2 in stock). I went looking around the FAQ and the forum, but I'm starting to wonder if it was a plug-in that used to do that.
Could someone point me in the right direction?

(I'm sorry to be a pain...I'm sure you get asked this all the time but I'm not exactly sure what it's even called since I can't find an exact reference to it in the forums.)

If it means anything I've already gotten this far and I'm liking Zen Cart FAR more than the ones I've used before.

[kobra]

There is a 3rd party module for this in the free softeare add ons section

Look for stock by attributes