Sorry about that me and him seemed to have posted at the same time or had been posting at the same time then he posted his before mine thanks for the link... very useful resource that I obviously over looked like a complete dumb ass.
P.S. If this is your dedicated server(not saying you have to because maybe you want it that way.) but you should add in the mime types to apache or what ever web server you run or if it's not your web server just throw them into an htaccess for 7z's so they don't just appear as text and actually download when you click the link by quick reference I think it's mime is
Code:
application/x-7z-compressed
or could be
Code:
application/x-7-zip
the Max OSX dmg seems to do the same thing
Once again if running apache just throw it in the mime.types file
Code:
File:mime.types
Line: application/octet-stream bin dms lha lzh exe class so dll (add here) "dmg" w/o ""