With a dual-monitor setup, how can I control which monitor gets which id number?

My primary monitor is a 24-incher. Recently I picked up a little 10" flat panel for a project. The dual-monitor setup is mostly working fine, in that I can move windows between the two monitors, change the alignment in Monitor preferences, set resolutions, etc. Unfortunately the little monitor is getting assigned Monitor 0 and the 24" is getting Monitor 1, so the panels are showing up in the wrong place.

I can work around by going into gconf-editor and telling the panels to use Monitor 1, but I'd like a better fix. Changing monitor assignments seems the obvious right way to go, but I could be wrong.

Setup:
- Ubuntu 10.10
- Core i3-550 using on-chip graphics
- Intel DH55HC with VGA/D-sub, DVI, HDMI
- No-name 10" flat panel connected to VGA/D-sub (has VGA only)
- Acer 24" flat panel connected on DVI (has VGA and HDMI ports too)

My SWAG is that the system is simply assigning Monitor 0 to the VGA port. The 10" is VGA/D-sub only, so I can't physically swap them to test this (FWIW I did move the 24" to HDMI and the results were the same).

Thanks for any ideas!

Try "sudo apt-get install xrandr" - Xrandr should solve the problem for you neatly