if you are looking for more planes, look at several of the mods -such as RSRDC_SH15_V550. it is for sh5 iI think but have been able to get acouple to work in sh4.
also look at the mod ASW_9.0_STANDARD_1.5, and in the fall of the raising sun there is a bunch of planes that do work in sh4. including PBYs
also look at Rubini's posts, he created a mod where jap planes drop torpedos and they do explode.
I hope this helps you on your search, I went through alot of troubles to find these, but finally did find some that work. good luck
