you CAN train in the sim under the USA Visa Waiver scheme I have a letter from the US state department authorising this,I did exactly this on a Gulfstream G550 course with flight safety in SAV in October 2006.There are mixed signals about this as TSA & State Dept do not work well together.If you have time to get the B1/B2 & C1/D visas (these are the 2 visas you need,but you can get both with one application & payment) that makes things easier.If you send me your contact details I will E-mail you the letter.You MUST have your TSA clearence before commencing Sim training.Good luck!