xf86config should give you all settings, not just the mouse.
Are you sure, you did not miss something when using it?
If not; is it possible to put the old monitor back and choose a generic monitor using some other setup tool available in your distro?
E.g. in SuSe there is a 'vesa compatible monitor' option, which results in a moderate resolution and sync frequencies, which would fit (almost) all monitors.
Then you can put back the new monitor, which should work.
Last edited by J_Szucs; 12-24-2002 at 06:38 PM.