Hey tamerbatar,

I think I have another idea to give you a chance to edit the repository list.
By following this guide (step 1 to 7), you can mount the root filesystem of your phone on a linux computer, and edit the files contained in it (including the repository list). This way I was able to change my root password, which i somehow managed to mess up, without reflashing my phone.

http://wiki.meego.com/N950/Fixing_MALF_state