Of course I would digitally sign the files from Charles, if he send them to me - for example in our dropbox.
This would eliminate the Anti-Virus problems with Original Executables, wether they are UPX'ed or not.
So If you want that, send me a mail so that we can discuss how we do that.
As i do not have dropbox permanently running, its necessary to tell me with mail if there is something new in it.