[2.0] dynamic control population

hello

im developing a mp3 portal to publish mp3 songs..and i have several doubts before going on with further development..

like will say after i have added an album i specify that i wanna add 5 songs for the particular album..how do i dynamically populate 5 textboxes..for the given value..
Eg: entering 5 must create 5 textboxes..

and i host those mp3 files in a different server n asp.net application in another..is it possible to read the file details of that mp3 file through asp.net for eg: file size and play length.

please do give me some solutions