I have created a model in MED and wish to get the highest fps possible. This model is just for scenic purposes and will have an empty script. Does importing as an entity or a model make any difference in frame rate? Also I read in another thread that WED has a limit to the number of entities allowed in a level, is this true? If so what is the limit and can I go around this barrier?

Modells are by now much faster then blocks. Most people don't you any blocks at all. There's no limit.

i dont think that there is any difference.

you can configure this "limit" on your own. its called the "nexus".
set it to a higher value and then you can have more entities(and particles and stuff) at once.

Oh, I think I got your questions wrong