Problem installing on G5

[Thomas Ferreira]

I have posted this same question on the YDL forum Install section and 
even visited the IRC channel but no one has any answers so I thought I 
would join this list and see if anyone can help.

G5, Dual 2GHz , 1GB Memory, 22" Cinema Display, two hard drives, main 
is the stock 160GB with OS X on it, 2nd is a new Western Digital 120GB 
drive that I want to install YDL 4 on it.

CD iso downloaded fine and burned to CD fine, checksum checks out fine.

Boot from the #1 disc fine, I select my install, install starts and 
lots of text goes on the screen, then hangs at /sbin/loader.  Will 
never get past that.

What am I doing wrong here?

Thanks

Thomas