Apparently I like writing Weland plugins more than actually using Weland. This plugin is intended as a replacement for Chisel's Merge extension. It allows you to copy most of the elements of one map to another, applying a linear transformation in the process. It does NOT give Weland multiple selection and the standard copy/paste functionality. You need to have at least version 1.4.1 of Weland for this to work. I won't repeat the README file here, as it is a bit long, but I cannot stress enough how important it is to read. There are quite a few features in this plugin, as well as a couple of odd issues. RTFM.
Get it now at Simplici7y: http://simplici7y.com/items/copy-paste- ... for-weland