Eh...

LOL @ not being able to downgrade

Let me spell it out for you.

1. Go on the internet
2. Do a search for Torrents... USE this link its a google search result clicky

download it, burn it, install it.

not being albe to downgrade, those sales people will fill you full of shit everytime. its got NOTHING to do with the hardware.

dont feel bad about it either, you bought the OS and the machine, **** em.

EDIT: If you are that bothered about all this then why not ue bootcamp to put a 20gb partition on your mahcine and install XP onto it until you buy a copy of tiger off ebay.