Topic on Project:Support desk

So, lets say I wanted to make uploads.mysite.com and use it as a repo, like Commons is. How would I go about doing that?

Additionally, how would I use InstantCommons at the same time as my own repo?

You should be able to configure them in Manual:$wgForeignFileRepos. That page has examples for both. Since $wgForeignFileRepos is an array, you can have more than one. The order should matter in case of conflicting filename.