7.10 installer buttons offscreen at 800x600

Binary package hint: gnome-panel

Ubuntu 7.10 installer issue. Operating in Live Session works fine, but when I go to install Ubuntu 7.10, the installer window is bigger than the 800*600 screen on this old laptop - the bottom where the buttons are is off-screen with no way that I could see to scroll down. I can't install without clicking the buttons and don't know the keyboard shortcuts for them.

I have also tried using an external display but it doesn't help. The Display Resolution setting is maxed out at 800*600. Although the internal LCD is limited to that, Windows would allow running at 1024*768 when driving only the external monitor, so I know the hardware can do it.
I don't mean to put two problems in one report, but if the second one wasn't there I'd have a workaround for the first...

The laptop is a Gateway Solo 2500 H1.7BCSW 12.11/300DX

ProblemType: Bug
Architecture: i386
Date: Sat Oct 20 21:01:15 2007
DistroRelease: Ubuntu 7.10
ExecutablePath: /usr/bin/gnome-panel
Package: gnome-panel 1:2.20.0.1-0ubuntu6
PackageArchitecture: i386
ProcCmdline: gnome-panel --sm-client-id default1
ProcCwd: /home/ubuntu
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-panel
Uname: Linux ubuntu 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007 i686 GNU/Linux