It's a while back, and I'm at work now but I believe I did this:
-Install game on PC, and install the mod framework + random targets mod ( and scoring etc if you want that )
-Theres a folder in your hitman 3 installation, with a lot of .RPKG files. Sort these so you can see the newly added/overwritten files easily.
-Copy these .RPKG files AND the packagedefinition.txt to the same location on your Hitman 3 installation folder on your deck. Overwrite the files when asked.
If this didn't work let me know, I can check on my deck what I really did, since this is from memory