I have just obtained a copy of Yellow Dog Linux 2.3 and I want to install it on my PowerComputing Power Center 150 PPC w/64MB RAM, (2) 2GB Hard Drives, running OS 8.6. How do I get my Mac to boot up to the CD? I've tried holding down the "C" key, and that isn't working, it will not recognizes the CD as a boot CD. Please help if you can. Thanks Eric