I just tried this with version 4 of CX and I got it to work.
There are 2 things that I did do that are not a default setup...
I modified the file:
/home/user/.cxoffice/dotwine/config
and changed the setting:
"Windows"="win98" to "Windows"="winxp".
Once I installed it, it worked except that it did not create a menu for the application. So I created one for it.
The app launch path is:
"/home/shadow70/cxoffice/bin/wine" --check --cx-app "C://Program Files//Family Tree Maker 2005//Ftw.exe"
Now it is working. It just prompted me to get an upgrade which I will do at a later time but otherwise, it seems to be working fine.