i've asked this before, no answer though... there's really no excuse for not having this option, it's not as if it's hard to put in there because it would require lots of extra work.. it doesn't.
and it's actually a very nice feature to have.. who the hell wants to save replays against AI anyway? those are boring, the only good replays are time attack ones, but those aren't nearly as fun to watch as replays with 6 human players of similar skill. (best motoring fans will agree.)
Anyone care to answer this?