One of the skinners or a mod/admin will have to give more advice to this issue but you may need persmissions to show certain things that could be or are controlled by Trademark. For personal use is one thing, loading a skin upto the WC Gallery Library would be different. Like I said you need one of the more experienced folks here.
Copyrights/Trademarks
Images taken from other sources cannot be accepted without permission, including but not limited to pictures taken from movies, television shows, games, web sites, magazines, celebrity pictures. However, although they are theoretically also copyrighted, we will be lenient concerning corporate logos and OS ports, unless we are approached by the companies and asked to remove them. An exception: sports logos. Sport organization make money selling the right to use their logos and explicitly forbid the distribution of art containing their logo unless a license is purchased.
And the Terms of Service (https://www.wincustomize.com/terms-of-service) :
CONTENT SUBMITTED WinCustomize.com/Stardock does not claim ownership of the Content you place on your WinCustomize.com Site. Stardock may quote, redistribute or reproduce in whole or part of your Content (if you have made it public) in order to promote your WinCustomize.com site and/or the WinCustomize.com service, but only on a fair-use-type basis. By using this site, you agree to the following:
All Content uploaded onto this site must be original material created by you. By uploading any Content to this site, contributors are automatically assumed to be the creator and owner of the Content. You may not upload Content created by another person or taken from another source such as another website, etc, without express written permission from copyright owner. Copyright violation could result in account cancellation and in possible criminal prosecution.
Just make sure all the images you create are your own and you should be fine (unless the copyright holder asks that the skin be removed).
