I had the same problem. For me installer fails when it installs fixGuid (use installer log in installer to see where it fails)

Here's how I managed to install rev.2 using GUID partition

Step 1
Create GUID partition using rev.1 DVD

Step 2
Install Leopard and drivers using rev.2 DVD - do not select any bootloader - install should be ok.

Step 3
Restart and boot with rev.2 DVD
Hit F8 and enter -s

Step 4
Enter following lines

cd /usr/standalone/i386
dd if=./guid/boot1h of=/dev/rdiskXsY (replace X with Leopard disk number & Y with Leopard partition number)
dd if=./guid/boot0 of=/dev/diskX (replace X with Leopard disk number)
./startupfiletool -v /dev/rdiskXsY (replace X with Leopard disk number & Y with Leopard partition number)

restart

and everything should work

Some steps might not be needed - but thats the way I got it to work

Helikutt