Help----black screen during set up

when setting up macbookpro, I made the apparently fatal mistake of not entering an admin password. Tried to go back and fix it by booting from original install Tiger disc. couldn't visualize option to reset pass. started the install, hoping it would bring up the option. then stopped the install, not wanting to reinstall over the existing system . It said you may not be able to start up in X. and sure enough.... Now I can only boot up from the install. Should I go thru the whole install now (two disks)? I did finally get the password reset, but it won't start with folder of system selected. HD icon gone. Also, the disc is still in, how do I get it to eject? Black screen says: Localhost:/root# CSRHIDtransitionDriver::Stop
10BluetoothHCIController::start Idle Timer Stopped. ANY help would be great. I'm really stuck here......

I thought of something else, I ran CleanMyMac 2 and when it was finished all the problems started.

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