Thanks Torfinn, I appreciate the answer and good work around. Strange, most professional cad packages will allow a single item to be changed but we have many work arounds for different items for these packages also. I briefly looked at the help files and didn't see anything that said all doors would be changed. It told you how to create a new style, but this is different from what I was trying to achieve. I will create a new door style and use it for my cad model.
Thanks again, Richard