Are the skins selectable in the Skin Options menu?
In the Options menu, after clicking on the osu! default skin button, you should be led to the Skin Selection Menu. Are your skins there? If not, check for the following...
- All skins must have a skin.ini file inside their respective folder. If you've downloaded them, they are probably there, but it is safe to check.
- The directory for skins should be "[...]\osu!\Skins\[your skin here]\". In other words, in your skin folder should be the folder of the skin, and inside the folder of the skin should be all the skin elements and whatnot. Make sure the individual files aren't lying around aimlessly in the Skins folder without a central skin folder to go inside.
- If all else fails, try downloading an .osk file. You can drag/drop them into the game or just drop it inside the Skins folder without a problem.
Anyway, if you have any other questions, you should ask them in the
Technical Support board. This board's for general discussions of things not necessarily game related.