Hi chris, try this maybe for custom ui

http://moi3d.com/forum/index.php?webtag=MOI&msg=6507.449

In v4 I believe there is subdiv built in, differences explained here:

http://moi3d.com/forum/lmessages.php?webtag=MOI&msg=9100.1

I'm not sure how you install the subdiv script from Max, had I similar issue
with lighting options not showing up but I cant find the thread....and currently
using 'vanilla'v4.

- Stefano