Default [Q] How to create a flashable root package

I own a swipe all in one tab and I had accidently broken it's port and want to root it.I had tried all the apps like z4root ,Framaroot,androot but nothing works I cme to know that rootx 2.1 is a way to root it but since the port is broken I can't try it.
Now I want to create a flashable root package for the tab but don't know how to create/find cert.rsa , cert.sf mainfest.mf


PLEASE HELP!!!