Kalyway 10.5.1 installation problem

[EstebanPeres]

Rght, I have searched the forums and have found solutions to part of my problems, however the problem is quite specific so I'll lay out the story so far:

 

I ordered a new hdd for the purpose of installing osx so I wouldn't have to mess about with bootloaders and such as well as not really having enough space for a dedicated partition on my existing hdd. Whilst waiting for it to arrive I decided to dip my toe in the water as it were and try and install osx on a partition on one of my usb external hdd's. I sucessfully formatted a partition to the Apple journaled (can't remember exact name) type and went ahead with the installation. I tried to boot up and was greeted with a b0 error, I hadn't set the partition to active, I did so and tried again, I then found out I hadn't set it to .mbr and was still unable to boot from it and was told a full re-install should sort it. I thought this would be to much mucking around as my new internal hdd was due to arrive the next day and I might as well wait and install on that. My new hdd arrives and I start up my laptop and boot from dvd, I tried a few times and it either goes through the darwin loading screen and gets to the grey apple logo screen and stays indefinitely (I left it for about 16 hours just to make sure it wasn't being slow, the first time I did it, it took 6 minutes or so) or more often doesn't even make it to the grey screen and just reboots. I have tried booting the external hdd partition to erase or reinstall and it makes it to the grey apple screen whereupon the dvd drive starts making horrible noises for 10 minutes - 2 hours, after this a reboot occurs. This is where I am currently at and am now stuck with what to do next.

 

My Laptop:

Toshiba Equium (aka satellite) A100-147

Intel T2050 Core Duo 1.66 Ghz

4 GB PC2-4200 RAM @ 533 mhz

Western Digital Scorpio 60 GB SATA HDD

Intel 945GM chipset

Intel 950 GMA Accelerated Graphics 128mb shared

 

Any help would be appreciated, thanks in advance.