i use nullsoft install system to create 2 setups. 1 for windows 32 and 1 for windows 64 bit I'd like to use condiction to check the operating system. that's mean setup 32 bit will not run on windows 64 bit. Anyone who use nullsoft and know how to do it? Please help me ________________ Dang Manh Cuong School: HCMC University of Pedagogy 280 An Duong vuong, ward 4, district 5, HCMC Vietnam Home: 555/2B Tan Dong Hiep, Di An, Binh Duong Home - phone: +84 650-3742-067 Mobile: +84 902-572-300 E-mail: dangmanhcuong@xxxxxxxxx Yahoo ID: manhcuong0312 Skype name: dangmanhcuong Blog: http://vn.myblog.yahoo.com/manhcuong0312 Website: http://ngoisaodanduong.com http://www.saomaicenter.org __________� View the list's information and change your settings at //www.freelists.org/list/jawsscripts