MagesPack DiskSpan integration?

[ozerune]

I am very new to this whole repacking scene and am trying to understand as much as I can about all of this. The problem I am running into right now is with the game Chaos;Child, and will likely run into this issue again when I do Steins;Gate. About half the game is stored in .mpk files, and the only way that I can find to unpack and repack them is with MagesPack, which from what I can tell doesn't work with FreeArc. Is there anyone who could explain to me what I would need to do to get these files properly repacked? From what I can tell, existing FreeArc compatible compressors and preprocessors cannot see too well inside of the mpk files, with a ratio of 90% when I try. As of right now, I primarily use DiskSpan GUI. I would prefer not to write my own code at this point in time, but if I absolutely have to and there is no other way, knowing the steps to take next would still be helpful.