I'm new to this wonderful world of FM and to this forum (planning on starting my first game tomorrow morning. Very excited

). There is a problem that I'm having that I could do with some help with.
I've downloaded both the Sky Sports and Lightning skins and put them in the skins folder. I then loaded the game up, went to preferences and tried to change the skin and only the Flexion and Flexion (right) options came up still. I tried re-starting my computer, and trying it again, and still the same thing happened.
Both files are unlocked and everything in them matches the Flexion files, so I don't know what I'm doing wrong. The only thing I can think of is that I'm using a Mac and the skins aren't Mac compatible.
Any help would be much appreciated.