Is it possible to copy another maps worlds file into another to stop you from having to re-add all the buildings?

You mean for example to remake a SWBF1 map like in the conv.pack??

Do this:

-Copy the files from the world1 folder from the map you want into your world1 folder
-Rename the files to your MODID.
-Be sure you have in your MODID world folder all the .msh's and all the odf's from the world you want
-Open up your new map in in the ZE
-Be sure that new map appears
-Than munge the map and have fun

***************************
***Questions? XFire: thedarkmask*
***************************

Or you could have a look at this from the FAQ
http://www.gametoast.com/forums/viewtopic.php?t=8519

That is an other way

Cool thx frag me!