[expert] MandrakeUpdate question.

[Dimitry]

I am running Mandrake 9.0 in KDE. In Mandrake Control Center-->Software Management-->Software Sources Manager, there are 4 sources: CD1, CD2, CD3 (of the distro) and "update_source". I wanted to remove "update_source" so I can change the FTP mirror, but I accidentally removed all sources. How do I get them back now: CD1, CD2, and CD3 sources?     Will it matter for upgrading the packages now that the sources (3CDs) aren't listed? Please help.