Q: Tiger keeps freezing on install

Is your Tiger installer a retail version that looks like this?

 Cheers, Tom

Which G3? Some need a firmware update.

Might alao see Xpostfacto...

http://eshop.macsales.com/OSXCenter/XPostFacto/

Does it meet these requirements?

Tiger Requirements...

To use Mac OS X 10.4 Tiger, your Macintosh needs:

    * A PowerPC G3, G4, or G5 processor

    * Built-in FireWire

    * At least 256 MB of RAM (I recommend 1GB minimum)

    * DVD drive (DVD-ROM), Combo (CD-RW/DVD-ROM) or SuperDrive (DVD-R) for installation

    * At least 3 GB of free disk space; 4 GB if you install the XCode 2 Developer Tools  (I recommend 20GB minimum)

http://support.apple.com/kb/HT1514

Can you get to Disk Utility?

1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.

2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)

*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*

3. Click the First Aid tab.

4. Select your Mac OS X volume.

5. Click Repair Disk, (not Repair Permissions). Disk Utility checks and repairs the disk.

Safe Boot from the HD, (holding Shift key down at bootup).

Reboot.

PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.