Can anyone tell me if it is possible to package the server behaviours that I have built with ultradev as .mxp files so that I can redistribute them to others?

I have written quite a few genuinely useful SB's, just through the built SBB in ultradev, and I would like to share them with others, particularly through this site. However, I can't seem to fathom a way to create the MXP files that are used to install extensions.

Any help would be appreciated.

Mark Wills