Needing 10 forums built relevant to HEAVYMETAL [url removed, login to view] will need to build with easy admin and frontend/backend user [url removed, login to view] can all share very similar templates,just color changes,use of flash will only be relevant to ad hosting,if at all.
Once built,these will need links/promotion to relevant sites/other forums.
They will also be an information database in which all other forums in the same genres will have their links hosted in a directory on the forum(seperate pages attatched to a front page link.)Searh bots will be needed to find these forums using keywords,as many will be hidden amongst content sites.
You will after the projects completion need to help SEO and link build,but this will be added on later with an agreed price if needed.