First Hi to the community

I've gotten hold finally of Firmware 1.2 5A147p, I'm currently on 2.0 Beta 3, but i want to go to 1.2 beta i've gotten hold of it, but there are 2 parts part 1 of 1.2 and part 2 of 1.2.

All i need to do is merge them into one so i can use them with WinPwn, any help on how to merge the files and what program to use, I'm also using windows if that helps, thanks all.