Erm,I'm in Chapter 4, where Bhodi has you run the Gauntlet for a game of cat and mouse. I know that this is originally where you're supposed to get Imoen back if you play the game normally. I'm using the Imoen Romance and she's not here. Is this normal?

Droken

Nope, that isn't normal; she should had been there with a extended dialog, so guess one of the many bugs of that mod ate her. :p

No idea of how to fix it.

I found a resolution on the imoen.org boards. Just CLUAConsole Imoen in, but not just any Imoen... you have to use Imoen10.

CLUAConsole:CreateCreature("Imoen10")

Did you install the little patch (v2.01 as I recall, but I'm too lazy to check)? It apparently fixes an "Imoen not spawning" issue.