That is if you cook your own rom. I'd probably recommend ppckitchen to start with.
I got the .cab files for the megapack from the post in the following link:
[10.12.08-UPDATE 19]ALL DEVICES INCLUDED NOW - Opal (Touch VIVA Version)
And if you want to read the whole thread..and have a week off.... :
http://forum.xda-developers.com/showthread.php?t=398173
I'm not sure how a mogul will handle it, I've had bad feedback from a couple apache users...And welcome to community!