How do you disable keyless access so you can use the regular key in the door and the ignition?

You can disable keyless entry, autolocking, etc. in the DIC setup. I can't answer your question about using a regular key in the ignition, because my car doesn't a key receptical - just the "dummy" key which stays inserted.

You can use the key inside the fob to unlock the door only - not lock it. At least, that was my experience when trying it yesterday.