Steve, if it is not commandline, can you elaborate on 4)
can it

By build x(a variable name)
Pick a few unique sourcefiles
Rename those to global names
Set some conditional compile flags
Include a number of common files
Build a library if required
Compile some, Assemble some and link all generating a .hex file with a name based on, not identical to 'x'. All this may change based on dbg or nor (two separate commands making it do it in debug mode (for the ICE) or normal mode (no source references)

oh, did I forget the above is in a directory structure specified by me, not the compiler manufacturer.

Erik