`<tab>` and <backtab>` to cycle through smex matches

[ColemanGariety]

In ido-mode I can I believe the <tab> key is mapped to 'ido-next-match. Is there a way to get this functionality back into smex?

EDIT:

I have my ido configured as such:

(ido-cannot-complete-command 'ido-next-match)

This effectively makes <tab> cycle through the options unless there is a "sole completion."

Shouldn't smex inherit this option from ido?

[ColemanGariety]

What is needed here is, I think, either an option to not override the pre-defined ido keymap, or a smex-setup-hook wherein we can set the bindings ourselves.