The Hosting Transfer module allows you to transfer an existing Jamroom site that is not on Jamroom Hosting to a new Jamroom Hosting.
The steps for how it works are outlined on this page:
The Gobal Config tab is the only one with any settings on it at all in this module.
You get to enter an Access Key to allow the site contents to be taken to another location.
screenshot of the Global Config tab of the Hosting Transfer module
You can also import an existing Jamroom site from Jamroom HostingtoJamroom Hosting if you wanted to clone the site to a different domain and make changes from there.