I recently put a fresh install of Tiger on my Power Mac G3 (Blue & White). It has 512MB of ram and a 20.GB Maxtor HD that I took out of an old 500MHz G3 iMac. The screen that it freezes up on is when it shows the grey apple logo and the little turning graphic below it. It will load for a few seconds, and then a black box will replace the apple logo and the turning graphic will stop. I have left it on for about 20 minutes after that to be sure that it's not just taking it's time or anything. Any thoughts?