Our website has a knowledge base with some information on the FMB. But we are all limited by the lack of support from the developers. Whenever I see interesting material it is added to the kbase and I continue to promote it on the forums, we already have some contributions from members of the community.
Airwarfare FMB Knowledge Base
Any help building this resource will be appreciated, there is also a Wiki section on our site which could be used to build an online manual, this would require a dedicated editor to be developed further.