OS Builder/Add additional Activities
Look into the sugar_activity_group and sugar_activities_extra modules.
sugar_activity_group
If your activities are published online and can being fetched from public URLs, the best option is to use sugar_activity_group. This works both for the builder and for later updates.
Define a 'base URL' -- for example, http://wiki.laptop.org/Activities/YourDeployment . Add the module to the modules list and a new section:
[sugar_activity_group] url=http://wiki.laptop.org/go/Activities/YourDeployment
The system will actually request a url adding the OS version number, so it will try, in order
http://wiki.laptop.org/go/Activities/YourDeployment/10.1.3 http://wiki.laptop.org/go/Activities/YourDeployment/10.1 http://wiki.laptop.org/go/Activities/YourDeployment/10 http://wiki.laptop.org/go/Activities/YourDeployment
For best control over activity versioning, create a page for this specific version http://wiki.laptop.org/go/Activities/YourDeployment/10.1.3 . The format of the page is described here -- the easiest way is to start copying the contents of http://wiki.laptop.org/go/Activities/G1G1/10.1.3 or http://wiki.laptop.org/go/Activities/G1G1Lite/10.1.3