Back to GB

Sep 14, 2012
Hello! :d
I flashed the miui v4 a 4 month ago and I updated the system scripts or what is the id on't want to use miui v4 or v5 I want to switch back to miui gb..but I flashed it and don't work..(only booting) please tell me how can I switch back to gb! Thanks! And sorry for my bad english!