Is there a way, or a hack, or a workaround, or a planned future enhancement, or whatever, that will allow one to import WED (.WMP) architecture that has textures applied to it, into MED as a model, and RETAIN all the textures and texture-mapping?

Because:
I'm finding that my current project is too big and too complex for 3DGS to handle. Maybe that reflects on me as a designer, maybe it reflects on the software, maybe a bit of both, but I've rebuilt the architecture in my level several times now, re-textured it, re-organized it (grouped it, ungrouped it, split it into chunks to try to speed up compiling, etc etc), and nothing is working. The nature of my project dictates that the entire level be loaded at once--it's based on a real building with lots of windows and open space, so fooling the user with multiple levels and billboards, etc, is not going to be effective. I'm on the verge of abandoning this project that I've been working on in 3DGS for two years and trying other software solutions. If I can get the architecture/model import/export to work with MED and .WMP's as described above, however, I may still be able to get this to work.

Thanks in advance.