Alrighty, fixed the script with some very minor issues (capitals ID instead of normal id, and fixed the quotation, although this is probably not that important)...
Try it if you will! See attached file... Install-options like Reinhard described, so:
1. Install ESX, should work just fine (keep in mind, let /boot be /dev/sda1, and / be /dev/sda2!)
2. At the reboot, use some Linux live-CD (I use an Ubuntu one, doesn't really matter)
3. Get the script on the Live-Linux distribution, ie. via SCP
4. Run the script
5. Reboot into your new ESX 3.5!
Great! Thanks again Reinhard!