Another really good reason to manage the uploading of your skins yourself:

The person whom you entrust to upload your skin could upload ANY old file without you knowing it, just as long as the filenames match.

So while your screen is showing you your skin, and you think you're driving around looking like this:



You could actually be seen by everyone else online as:



...and the only one not in on the joke would be you.

If you're a demo player, and looking good matters to you, then it really is worth going here and paying the meagre £3 for a shed-load of skin slots.

Still, could be worse.....