Downloaded skins for SCDS2..Where do I put folder?

I just downloaded some skins for my SCDS2 and wondered where do I put the skins that I downloaded? Do I need to create a SKINS folder? I have no idea. I shter a program that can install the skins or do I manually do it? Thanks.HoustonTX224Post Merge: [time]1289878833[/time]
I got some help on where to place the MARIO skins file..(in the ui folder, root on ds card0 but, when I did and restarted my DS..I could see a few icons.. and the background was all blakc..NO MARIO to be seen. Making progress but, the wrong kind..lol Help..:-) Thanks.HoustonTX224