There is a great B-29 for FS2002, but it won't work in CFS3 I don't think.
In case anyone is looking for one for FS2002, there is a great one in the download section of Surclaro by Christophe Rosenmann:
http://www.surclaro.com/nuke/html/download.phpJust type in "B-29" in the search box-
There is also one for CFS2 on that same page