Reinserting files into a .DAT file

[Kyougi Ryu]

I'm interested in attempting to create a rough English translation of The Turnabout of Haruhi Suzumiya/Suzumiya Haruhi no Gyakuten. All of the game's data is stored in a file called saiban.dat, so I used a program called Crage to extract everything, including the scripts.

I can open and modify everything easily, but I don't know how to go about reinserting my modified files into saiban.dat. Would anyone be willing to help me out?