spiderman, >>> if you have I 20 for fall 2007, you could stay legally at US for 4 months (correct me if I am wrong) before your classes starts. >>> you are wrong here. that would be true iff you woul have attended school for 9 mths(2 full sem) in that particular year. when you are going from 1 degree to another. you cannot stay in US for 4 months in the gap. 3 months would be max. meaning.... 60 days grace from expiring OPT/degree completion. then 30 day [ prior to starting new term i.e. you can come 30 days prior to start date only] beyond 90 days. its not legal.