computer freezing during bootup

My issue is this:

Took my Powerbook to the Apple store because, if can you believe this, it shut me out with a mysterious log-in request, which I had not engaged, plus the thing had begun slowing down... I asked if they could override the mysterious password issue and do a backup/erase/reinstall. They told me they could not and my hard drive was failing so I bought a new drive, installed it and am now experiencing a "freezing" issue everytime I try to boot-up from my OS X installation disc. Actually, the "freezing" was occuring with the old hard drive as well, but only during a reboot through the disc.

Does anyone have any ideas??? Maybe a password override solution or has anyone experienced this "freezing" issue before and have a recommendation?

thanks!

 

boot up issue

Thank you. It's worth a try.