I was able to create a 16kb basic application with the tips here:
http://www.mvps.org/user32/nocrt.html

This poses a couple of problems.
Since all the default libraries are being ignored, using math.h or any other header (have not tested) then the linker complains trying to use a function from the library. The attached project uses sinf(float) from math.h but it will not link. I am not sure if you have to link to another library file and what it is called if so (not math.lib).

Secondly, I have no idea how to write an operator function for 'using' and 'namespace' . Adding #include<sstream> and using namespace std; will not link.

Any ideas?