[piri_reis]

Guys it's definitely a memory problem.
You all shouldn't expect to enable this on top of your heavily modded SH3 and make it work right away.
For me I have lots of extra ships, campaign additions that cost memory, and without the (/3GB switch and exe patch) it will CTD on campaign start.

So I recommend to people that have the hardware and that use XP (4GB RAM), to try those memory solutions.

For other people, you might have to decide on which mods to use. You could disable big memory consuming mods to get the Interiors to work. It's just not plug&play in my experience.