We have indeed rearranged it so that Dagobah comes in very early on. I agree about the placement as not leaving enough time. I wondered if it might effectively appear as if enough time has passed (after all, in ANH they plug in R2, see a horrible Death Star schematic that doesn't match the real thing, see the Death Star approaching Yavin, then we go on to the Yavin briefing. However, I again agree, it might fit better earlier. Sluggo, I really feel it fortunate that you are here. Please download my earlier script (you can find it starting at the bottom of the first post and following the Yellow Brick Road), and telling me where you think it may fit best.
As for Bothan acting, I thought it might be easier to simply use costumes and human dubbing. That way we don't have to pay their outrageous contractual demands either. I tried to write the scene so we would actually see very little of the Bothan himself, only revealing his hands (can be decent costume gloves) and eyes (probably not too hard for CGI, and possibly even reused from some other film).