I believe I already tried that. I say believe as I am new to this, or any, forum. I assume you mean the basic game when you say vanilla. It definitely did not work. I realized that I do not have the most current version of warlords and am currently downloading the patch. Should only take another 8 hours. (I live in an area where high speed in not an option.) However, scanning some of the titles of the posts, it looks like there might be a problem with the patch? If I am assuming incorrectly, please let me know. I also think you should be able to play any scenario you want without switching disks, but I guess you can't have everything.
BTW-what is with the whole vanilla reference? Is it some kind of joke? I have always heard the term used in a sexual/deviant context. Just wondering.