You could put the freebie on the product page, and maybe e-mail the people who've bought the product to tell them about it. Anything you put in freestuff is going to be downloaded by lots of people who can't use it. I made a dress which was a modification of a PoserWorld item, Objaction encoded so you needed the original. Many more people downloaded it than PoserWorld ever had members, and I only had a single query from someone asking why it wouldn't work. Go figure, I think the expression is. ;)