Yeah, but they have to MIDI's. You can't load WAV's or MP3's on the 7510. Once you find the MIDI, I believe it's as simple as emailing it to the 7510 or just browsing to the site that hosts the midi.
Then you are on the webclient. Did you delete service books and resend them to see if that helps? The only attachments able to be viewed on the BB 7520 are gif, tiff, png, word, excel, ppt,jpg, bmp. Email me at if you still are having problems.