well like I say I can get you into a an IJN Sub in about three minutes
as long as your willing to ignore thats its a US built sub.
No Problemo
as for Mission building thats the same in either game
but campaign building in sh4 I havent looked at in detail
I am however totally confident it can be done but an authoratative
answer would have to come from tater at this point.
M
[edit] the real question regarding campaign is not can we get an IJN sub
but can we get a working IJN sub base? (tater?)