How do I configure which program to use with rtsp protocol?

[SamBeyond]

When I type to Start -> Run "rtsp://somedomain.com/somestream.sdp" it opens up Media Player Classic. I would like to change it to VLC media player. How do I do that? (A bonus: how do I say which protocol should launch in which program?)

I couldn't find any information on how Windows decides based on the protocol which program to launch. (A bit like the "File Types" list in the Folder Options)

I searched with Google and Google Groups, went through the MS knowledge base, searched the Windows registry, but couldn't much specific information on this.

[SamBeyond]

In case somebody else is asking this too, I'm reporting that I did find it from the registry after all:
HKEY_CLASSES_ROOT\rtsp\shell\open\command had "C:\Program Files\Media Player Classic\mplayerc.exe" %1 as data. Changing that helps.

[tomo222]

use comand prompt that usulay lets you do things like this