the midi's should download straight to your phone.
easiest way of doing this is by wap; if you have this on your phone look for the enter address (url) option, then add: http://bungle.250free.com/replace.mid
..as a bookmark. you can then replace just the filename, saving u typing the whole url each time u need. here is the main list.. there are some 3000+ tones here, but unfortunatley not all drum n bass. hope this helped