Vista on Inspiron

I have a laptop that that a got from Dell a few years ago. It had Vista on it (I'm pretty sure it was Premium edition). The motherboard fried a few days ago. I never kept any kind of warranty. I also have a Dell Inspiron 1501 that works great, but it has XP. It has 2GB of memory and meets all the Vista requirements. I put the OEM Vista disk from my other laptop into the Inspiron 1501 and it booted and began installing Vista. It got 30 minutes in and said this laptop does not meet the necessary requirments for Vista and said that it was restoring XP. I double checked and it does meet the requirements. As a matter of fact, when I bought the Inspiron they asked me if I wanted Vista or XP and I stupidly chose XP then. I figure the problem is that the OEM disk is meant for my other laptop and it recognizes that. My question is, is there a way to "trick" the install program into allowing it to install Vista on my laptop?

Thank you.

 

What? I've never had a Vista disc stop installation stop due to a system not meeting requirements? You sure your disc isn't borked?

 

I'd second this. Can you take a picture of the screen where it says this?