Mac OS X Will Not Start Up!

Hi
I have a major problem right now with my Mac Mini, thats why I'm on my Ibook G4 at the moment.
After having reinstalling on of my pieces of software (Dreamweaver 8) my computer asked me to restart. So I did do so and now at startup loads of writing comes up in these black bars.
In the writing it mentions 'kernal and Darwin several times and at the end of the writing it says 'Panic: We are haning here.....'.
I also tried putting in my 'Mac OS X Install Disc 1' to see if I could reinstall Mac OS, but now the disc is just stuck in the drive.
Any help would be very greatly appreciated!
Mac Mini Mac OS X (10.4.7) G4

You are experiencing a Kernel Panic.
First, to remove the disk. Hold the mouse button down while powering up the mini. This should eject the disk.
Next, follow these instructions to help solve your Kernel Panic: http://www.thexlab.com/faqs/kernelpanics.html

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