Run your own file upload site like 4Shared, Rapidshare or MegaUpload with File4Shared Script. File4Shared Script script is an advanced solution for creating free file hosting websites. It can be installed on any virtual/shared or dedicated hosting running Perl (most servers do). You can customize look and feel of your site with just editing HTML files and can place banners, adsense or other type advertisement on its pages.

Features:

AJAX upload progress bar (All xupload features) 
unlimited upload file size 
ability to limit size of uploads (overall and per file) 
multiple files upload 
block or allow certain file extensions 
unique download link 
password protected downloads 
captcha protection (unleechable download links) 
set download link expiry time 
allow/disallow IP/network 
email link to yourself or to a friend after upload 
customizable look and feel (editable HTML templates) 
admin receive notification about uploaded files 
admin can log in and view upload/download statistics 
admin can control most settings through admin interface 
ClamAV Antivirus validation (if ClamAV installed) 
Adjustable counter in download section (users will spend more time on your pages)

http://www.clone-success.com/products.php?product=4Shared-Script