To post a request just make a thread with its exact title on the Requests board, and include either all the other information you may have about it (platform or operating system, year of publication, publishing company, etc.) or, more conveniently, a link to a website with that information, such as
MobyGames.
We don't collect physical media on behalf of Abandonia itself, but some user might be interested in your generous offer. If you want to give away your disks you could post a thread on the
general discussion board.