You are suposed to be able to laod programs by putting them in .minecraft/mods/ComputerCraft/lua/rom/programs/. but only the vinlla install is there.
I have FTB insatlled at C:\Games\MineCraft\Direwolf20 and it looks like the correct path is C:\Games\MineCraft\Direwolf20\minecraft\mods\ComputerCraft\lua\rom\programs. I matched the files that show in game to the files in the modpack zip and was told in the computercraft forum to unzip the folder and it should work (I tried puting them in the zip).
Un-zip the zip file and name it "ComputerCraft". When you put a script
in there it should instantly update in-game when you restart a computer,
I tried restarting before removing the zip and FTB complained about dupe files. So I moved the zip. I had downloaded a program from the pastebin link and renamed the file to a name without the .txt. and put it in that folder. but it still doesn't show in game.