The first machine I tried to install my shiny new copy of Tiger onto was my Powerbook G3 Lombard (Bronze Keyboard). That's when I found out that Apple decided to remove my laptop from the list of supported installs.
Now I had only three options: (1) stay with OSX 10.3.9, (2) wait for XPostFacto to support Tiger, or (3) find a workaround. I chose door number three..
I had just spent a large chunk of money on new memory and a larger hard drive only to find out that Apple's newest OS won't work. Some internet searching proved that the pre-releases of Tiger did work with the Lombard Powerbooks, so my belief was that Apple just changed the installer to exclude my favorite computer. I was correct. Here is how I was able to install OSX 10.4 on my Powerbook G3 Lombard.
- Attach an external hard drive to the laptop (I have a PCMCIA firewire card so I used a firewire drive, but I imagine a USB drive would work, too.)
- Use Carbon Copy Cloner to place a copy of the laptop hard drive onto the external drive.
- Move the external drive to a Mac supported by the Tiger installer (I used my G4, if you don't have one, find a friend who does.)
- Install Tiger onto the external drive.
- Move the drive back to the laptop.
- Use Carbon Copy Cloner to copy the external drive onto the laptop internal drive
[robg adds:A hint from earlier today provides another possible solution...]

