okay, i dont know anything about Swish-E
but there is a feature in cpanel, if enabled, allows use of some free cgi scripts. one called entropy search. If its enabled, you should be able to see it listed under
http://yourdomain:2082/frontend/x3/cgi/index.html (provided you are using cpanel11 with x3 theme) or simply look for "cgi center" under your cpanel account
anyways, that might do what you need? dont know how efficient it is with joomla repositories and pdf/etc files.