Mkv To Avi With 5.1 Audio And Under 4gb Or Split Help, having a hell of a time with all this remux etc crap Options

[darklord88]

hey guys, after searching the internet for probably the past year, ive YET to find a working solution for a person unfamiliar with all the technical jargon such as 'remux' 'mux' etc

my situation is this:

i have 5 MKV files, all over 4 gigs, all with 5.1 (6ch) audio, all 720hd

why am i having SUCH an IMPOSSIBLE time converting to a file type that:
A) my 360 can read
has 5.1 surround sound, i do NOT want 2ch audio, this is not an option (its 2012...who the hell wants stereo)
C) maintain roughly the same video quality
D) is either under 4gb to put on my Fat32 drive, or is split into parts with original quality

im trying to set up an external hard drive for my parents, like mentioned its fat32, and when ive used gotsent, or any other program im either left with a file thats 4+ gigs, a small video but with stereo audio, or an unplayable file.

can someone point me in the direction of a SIMPLE or easy to follow guide or method, with whichever program you use, to get me a great quality video, with 5.1, while either split into 2 parts, or one that it under 4gb?

gotsent keeps saying 'error extracting audio' or something when i try splitting it, and no other program seems to be working as i dont understand what half of this stuff means.

im good with computers, but clearly a 'noob' when it comes to this.
i hope someone can help!

and dont say 'use the search' or 'use google' or any waste of our time answers. every forum ive read where someone asks for help, its nothing but ppl saying 'well why dont you just use mp4' or 'did you even google it?' etc

if you are one of those people...FUCK OFF.

help me xbox-scene, you're my only hope