If I understand your question, you want to take a multi item and have it become static in the map. If so take a look at Worldmaker available from
here.
It allows you to place a multi, like a small stone house or the keep, in the map and then save them as statics. One thing to remember though is to remove the doors from the multis as you place them. Also you might want to remove the house signs too.
This program also allows you place statics although the current placement system is tedious. You can also select large areas of statics and delete them. That is very handy for clearing forests. It provides an InGame view of the map and you can zoom in and out. It is still under development so be patient in waiting for features to be added. As it currently stands it seems to be a good program with little or no bugs. It is emulator independant and runs as a standalone program.
Sorry for going off topic but I think this is one of the best and easiest to use programs that has come along in a while. So I guess I am somewhat excited about it.
