Sounds like the installer core dumped. It's possibly due to resource conflicts. Try removing all PCMCIA devices from their slots. Also try disabling unnecessary devices in BIOS, such as serial ports, parallel ports, and etc... Try disabling power management features during install as well.
Hope this helps!
BTW, which particular Toshiba labtop? You can also try to limit the amount of memory to be used during install by typing the following at the prompt