Silent Hunter II game editors help

[Rcsubs]

Hello Group,

I have downloaded the patches need to turn SHII into Pacific Aces and after playing the game I would like to do some editing on my own for my own use, not for posting mods anywhere. I do have some programming knowledge and would like to do a little editing on the game and maybe even learn something new........

Could someone tell what programs I need and wher to get them???

I have been doing a bit of searching but so far no luck, but then what are your chances of finding something when you do not even have a name for the item your looking for.............................

Thank you for your time and help,
Darrell