@ papermoon: thanks for the info but they need transcripts in sealed envelope from the corresponding institution directly. 

@user248: Thank you very much. The information is very helpful. Yes, they say 'official' not the 'original'. I will find somebody to do that for me. However, did you have any problem in getting the accreditation. Their standard has listed that one must complete 16 credit hours in "General Education Component", which includes history, literature, philosophy, fine arts, social science.... so on. We never had such courses in our curriculum. Did you get any comments from NCEES regarding that. Thanks again!