Shouldn't be a problem mate.
Unless your Avalaunch install is of a different version entirely to mines, and they happened to change the way skins work, which I think is highly doubtful, your skins should go in "<path to Avalaunch>\media\skins\", in a subfolder containing all of the skins files, and named accordingly.
<Edit>I just realised the forum we're in. You've got this in the wrong place - shouldn't really be a problem, except that you may get shouted at for not paying attention... and you'd probably have gottena quicker reply in the Dashboards Forums/ Official Avalaunch + Qwix Forum.