a script to check share types

[bakwas]

hi
   i m running a hub on my campus lan ....everything is running fine except lots of ppl will share only music or even worse installation folders  like  windows or "program files" to achieve share limits.....i want to impose share limits like u have to share at least certain amount of video files to enter the hub....is there a script availbale to check the filetypes os shares that ppl r sharing.....i will highly appriciate any help......
thanx in advance.....