help with location

[rkmr.em at gmail.com]

i want
/userupload
/userwebupload
/uploadvideo
etc,
any url with 'upload' in it to get served by a specific backend, i can
use fastcgi_pass for the backend part.. how do i specify location for
this ?
something like this?
        location / *upload* {
            root   /home/mark/work/pop;
            fastcgi_pass backend_pop;


thanks a lot