drop down creation using database depending on value chosen

["wap" <wap@sinfo.net>]

Hi!
im creating a form composed of various parts, the first section lets you
choose
a brand of product.....the brand gets 'memorized' and jumps to the second
part of the form, to another page,
Now, depending on the brand chosen, i want to display a drop-down
box (using select) with the 'models' of the brand....
i tried using the brands as accessories in order to use [item_accesories],
but it is not working....i dont know if i need to enclose it with
[item-list] or something....(the UseModifier is correctly set in
catalog.cfg)
Please help..?

Thanks