Haha, no not a 45nm although that might be a fun challenge
Processors don't have to be tiny, the one I am designing will be large... very large, like maybe a foot by a foot in size...
Essentially my goal is to design something with the computational power of maybe a PDP - 6
I am starting with designing a machine code, and then I will be working on the architecture more.
Edit: as far as SMDs go, I am not sure. I would like to design all the components, but I have heard about processes of getting these things built into chips professionally... I will look into it when I get a bit further in.