StormC is not a very good compiler. I used it in the past but I switched to GCC because it allows me to compile my code everywhere and it's more portable.
I would advice you to use
Cubic IDE as it is maintained actually, has syntax highlighting, uses gcc to create the code etc...
You don't need OS3.5 developer CD.
NDK 3.9 will be more than enough to get the autodocs.
