Drupal: Need fast! Convert a domain access based sub site system to one based on organic groups and spaces

I have an existing site that has been upgraded from drupal 6 to 7 on a dev server and a sub site system needs to be created using the spaces module and organic groups to allow for sub sites that share content and have their own forums. Developer not responsible for making all state sites (it will eventually be all the states). Each space will have custom header ability but will mostly be a an organic group with a few group content types needed (group event, news, forum). Each space will be at a sub domain of the same site. Shouldn't be too long a job, but need it fast! (3-4 days) I have a dev site on pantheon that you must develop on as Ill be adding unrelated things to the install as we go.