Question [Q] firmware update

please help I am running bad boyz 1.3. I am s-off, h-boot 3.16.0.0000, radio 1.05.20.0227_2, cid 11111111. want to upgrade to bad boyz 1.5 what firmware do I install and or what order. sorry if this has been asked I have look all over the forms. just want to make sure I do it right.