Parts Pack for Kerbal Space Program, featuring ISS-inspired habitation, science lab and other crew compartments for building space stations and planetary outposts.
I like the IACBMs, but that hole in the middle looks awful when they are used with anything other than a Karmony module. The old CBMs had an included hatch texture, so you could use them on anything without looking like someone forgot to put in a door.
Adding a hatch mesh to the IACBMs and making them toggleable via Firespitter animations should do the trick.
In fusty's old FusTek thread:
Adding a hatch mesh to the IACBMs and making them toggleable via Firespitter animations should do the trick.