Android .obb files (repack problem)

[halfway]

I want to know how to repack obb for android games files?
I mean those bobs Wichita them we can open it with zip or winrar
it's possible to extract with zip tools but we can't use repacked bobs in game... because game will close or game will show a black screen
any body know how repack obb files without problem? (obb is PK is type, like a zip file)

[tr1cky]

dont know how to repack but il tell you what i did when i downloaded the apk right click on it go to properties and change what opens the apk browse though your pc and find winzip or winrar and change it then back out then it will open in what you changed it to if you know what i mean lol should be good to go

[halfway]

dont know how to repack but il tell you what i did when i downloaded the apk right click on it go to properties and change what opens the apk browse though your pc and find winzip or winrar and change it then back out then it will open in what you changed it to if you know what i mean lol should be good to go

i know that. i just want edit files in obb file... i can extract them, so extract is not a problem
how can i edit obb files?