In 2003, BrainStorm acquired a Write to clipboard function.
If your copy of BrainStorm is older than that, we recommend that you update it. Just go to http://www.brainstormsw.com/download.html
If you have a current version, you will see in the Write options "Write to clipboard instead of file". Just check that box and the Write will divert the outline to the clipboard.
All you need to do then is to go to your other program and paste.