Would anyone be interested in having something like this uploaded?
I think this is a worthwhile idea. It was nice to get the Phantom Lady stories without having to download all the comics which don't always contain stories I'm interested in. For characters like The Duke of Darkness, Yellowjacket or Captain Wizard, it would make life easier for fans who just want to read those stories and may not be aware of what titles to look for.
I know there are server issues right now, but might I suggest a special section for these collections so that it's easier for new members to know that they exist. There's a lot of files here so it's easy for something to get lost in the shuffle and go unnoticed, especially for people who may not be as knowledgable when it comes to Golden Age comics, publishers & characters.
I'm not sure how to credit the scanners/etc. since I did nothing, should it just say by goldenage.co.uk or GAC?
Perhaps if it's not too much trouble, maybe you could ad a text file that states what comics the appearances are from. That way, if a member wants to check-out the original file/comics, they'll know where to look.