Display problem trying to install FC3

[robrosenthal1]

Hello all. I am currently running FC2 on an HP Pavilion zt1175 laptop 
with no (or at least, no insurmountable) problems.

A few weeks ago, I tried installing FC3. However, the display was all 
screwed up once the graphical installer started. Essentially, the right 
quarter of the monitor was not being used and the bottom quarter was so 
distorted that I could neither see what was down there nor navigate any 
of the buttons. Mouse-clicking on the bottom quarter produced what 
appeared to be an inch and a half high cursor. Navigating by keyboard 
and by guess, I was able to proceed through the installation (without, I 
should mention, seeing a screen permitting me to select my monitor 
type). Once rebooted into FC3, the display problem persisted. Changing 
the hardware settings for the display to what worked fine in FC1 and FC2 
(Generic LCD 1024-768 with 60Hz refresh rate) and rebooting did not 
solve the problem.

I've googled, checked numerous forums, read the FC3 release notes, etc., 
and have not been able to find an answer.  Any help would be greatly 
appreciated!

Here are some of my system specs (if further info is needed, just let me 
know, and sorry for the long text dump):

HP Pavilion Notebook PC
capabilities: smbios-2.3 dmi-2.3
slot: Insyde Software SM-BIOS For VT8703

product: Intel(R) Pentium(R) 4 Mobile CPU 1.40GHz
slot: PGA478
size: 1400MHz
capacity: 1400MHz
clock: 1199MHz
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 mtrr 
pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm

L1 cache
size: 8KB
capacity: 32KB
capabilities: burst pipeline-burst internal write-back

L2 cache
size: 512KB
capacity: 512KB
capabilities: burst pipeline-burst external write-back unified

SODIMM DDR Synchronous
serial: 1
slot: DRAM Slot 0
configuration: width=64

SODIMM DDR Synchronous
serial: 1
slot: DRAM Slot 1
size: 256MB
configuration: width=64

P4M266 Host Bridge
vendor: VIA Technologies, Inc.
clock: 33MHz
resources: iomemory:a0000000-a3ffffff

PCI bridge
product: VT8633 [Apollo Pro266 AGP]
vendor: VIA Technologies, Inc.
clock: 66MHz
capabilities: pci normal_decode bus_master cap_list

display description: VGA compatible controller
product: VT8375 [ProSavage8 KM266/KL266]
vendor: S3 Inc.
size: 128MB
clock: 66MHz
capabilities: vga bus_master cap_list
resources: iomemory:e0000000-e007ffff
iomemory:90000000-97ffffff
irq:11

description: Multimedia audio controller
product: VT8233/A/8235/8237 AC97 Audio Controller
vendor: VIA Technologies, Inc.
clock: 33MHz
capabilities: cap_list
configuration: driver=VIA 82xx Audio
resources: ioport:e100-e1ff
irq:9