Region 1 is for US, and Canada, Region 2 for Europe, and Japan.
To change your region settings from 2 to 1, open My Computer".
Right click on your DVD drive, click "Properties".
Click "Hardware" tab. Click on your DVD drive in scroll-down list.
Click "Properties" button.
Click "DVD Region" tab.
You'll see "Current Region". In your case, it'll display "Region 2".
In "New Region" field, type in "Region 1".
Click OK. Done.
Warning! Don't play with changing regions, too much, because it's limited to FIVE changes only. After that, you're stuck on whatever last region was!