Snapping a Group of Objects To a Point How?

Hi

I have a group of objects (buildings) in one blend file and i’ve grouped them. I have another blend file of a site plan and i’ve appended the group into that blend file. Now i want to position the group of objects by snapping to an exact location on the site plan. How do i do this. When i try, the one object in the group that i set as the point snaps to the cursor but the rest of the objects in the group just disappear.

Thanks

I believe, that you need dupligroups. Create an empty, press F7, select Dupligroup and enter the name of the group.

ok, created an empty, attached the group to it, but it hasn’t duplicated the group at the empty.

thanks