I got this hack working easily and quickly...nice job.
One suggestion, we like to link to the download on the owners site rather than upload gigs of files to our server. Some of the extensions of those downloads look like this:
.download.asp?fileid=95
Or something similar. Unless I put that entire phrase in the "Allowed Extensions" area in the admincp, it will not work. I suggest allowing any type of extension in the link area if that is possible.
Other than that, great job!
Installed at:
http://thephotostation.net/forums/downloads.php?