ok, I downloaded it, installed it and ran Minecraft.
Maybe All this frustration is for nothing. Is Minecraft Coder Pack = MCPC? if not, then I already have a non-MCPC running, and I am barking up the wrong tree. If it is the same, I don't know how to remove it. I assumed (possibly in error) that the "MCP" was MCPC, and it was installed with the Forge stuff (from the same website your link took me to).
anyway, I'm really not as stupid as this situation seems to indicate - although from an experts point of view, it may appear so