I have an old 512 MB dv1040 US HP laptop with Helena (LM

Here are the issues:
1. The CD / DVD drive is gone bonkers - 1 out of 10 times it reads the disc and when I get to install things go haywire and I get "Installer crashed" - I see an IO error so I am attributing it to my crazy drive
2. My laptop is old and in BIOS there is no USB, so I cannot do this via a bootable USB. Only Floppy Drive, HDD and Network Adapter are the options left.
I am still trying to get the DVD to work (I burnt the 32 bit gnome ISO onto it - the full DVD) but I am not too hopeful.
What are my options? BTW - in an attempt to do what I did earlier I managed to overwrite LM8 with Win XP, this is because the laptop came with Windows which I got rid of immediately to get to Linux, so I thought I would redo that stunt. Win XP has installed well (god dammit !!), so now I am actually trying to get rid of win xp and get to LM11.
Is there someway I can use the n/w adapter? Or can I somehow install off the hDD? Please help, I am not a very advanced user - so please be a little patient with me

Thanks,
Ananth