i like your csiotructnon ideas, looks good. it probably needs some more trial and error work.keep going and more power to you.
You should try the iDEN Media Downloader by Motorola.
It's supposed to work with any iDEN phone with the Media Center, which the i855 has.
Download link: http://idenphones.motorola.com/iden/support/software/html/media_download.html