So, after about a week of effort I was able get prologue day 1 into the VITA.
Link Here
I was lucky enough to find a .mrg extractor on the web, but there was no compressor in the person's git.
I wrote a script that will take the translated lines from the English translated .ks files and the untranslated files from the decrpyted .mzx files and luckily the number of lines matched. At least for the prologue.
It was easy enough to then insert the translated lines into the vita file.
Next I wrote a compressor in the style of the .mrg file.
Placing the new allscr.mrg file into the vita, and the game worked!
There are a few bugs. Sometimes the lines will run off the bottom of the screen.
Link Here
Also I noticed that in the Vita the player decisions are text in the .mzx file, but in the pc translation I believe they are images. These will probably have to be hand translated but I don't know enough Japanese to do so, or where to find the English decisions.