I see from above that FC has installed the "vesa" video drivers and as I thought, "800x600" is the greatest resolution that it will let you run.
Search Google for linux driver for your Acer Travelmate. I see it has an intel chip, although I'm not sure which one.
If you want to manually edit this you should copy the xorg.conf file to another name like "xorg.conf.mine".
Then open and terminal and su to root permissions. Enter "gedit /etc/X11/oxrg.conf" and when it opens you can change the Driver under the Device section to "vga". This will be the generic vga driver. Next, add the mode "1024x768" in front of the 800x600 entry for Modes.
Save this file and then log out and log back in. If your machines works okay with these generic settings that will get you by. You can then attempt to move to 1024x768.
If it crashed and X won't start. Open a terminal to repair it, go to su again and cp the "xorg.conf.mine" to "xorg.conf" and restart X by entering "startx".
This should get you back to where you are today if the manual edit doesn't work. If you can find the appropriate driver, still save the file in case of crash and install follwoing the directions that come with the driver hopefully.