I have one question...
TGC is compatibility with non-WeiDu NTotSC or not? :>

As far as structural (general) compatibility is concerned, its technical documentation says that it is compatible with non-WeiDU mods as long as the installation guidelines are complied with. This basically means that you have to install it after non-Weidu mods, but there might be some other hints as well; if I remember correctly, there were such installation guides on Gibberlings3 and/or other places.

I don't know NTotSC, so all I can say about the question of functional compatibility is that TGCEp1 shouldn't be more, and shouldn't be less compatible with it than any other WeiDU mods. An original game area is "occupied" by the mod, but only temporarily; when the mod's plot ends, the area will return to normal.

Anyway why do u still use non Weidu NTotSC?

mm75

Mainly because there is no WEIDU version of NTOTSC???

Find one here NTotSC WeiDU

Well, maybe someone will help me understand this one. I always though Weidu was a compiler, that enabled all mods done under it to be cross-compatible with them as well as with non weidu mods...

EDT: As Aurelinus (NTOTSC author) said, it is WEIDU that`s compatible with NTOTSC, not vice versa. But i wonder what would that patch for BGTNTOTSC change if i`m not using BGT...

WeiDU *can* be compatible with one another, but compatability is not guaranteed simply because two mods are in WeiDU format. It depends on what has been added/changed, how competently the mod was coded, etc.