I downgraded my Iphone 3G from 3.1.3 to 3.0.1 and to make a long story short, had issues and my only data backup remaining is from firmware 3.1.3. I cant restore the backup through itunes without upgrading back to 3.1.3 since the backup was made on that version.

Is there any way to restore this backup without upgrading back to 3.1.3?