[@mercime]

@VirtualityReiki I would do this in test installation, uploading copies of your server files and importing database of your bbPress install.

Assuming your bbPresss is in subdirectory, http://example.com/forums/, install WP at domain root using the same database as your bbPress install. Install and activate BuddyPress. Then follow this: https://codex.buddypress.org/buddypress-site-administration/using-an-existing-bbpress-installation/ where you point to the bb-config.php file in http://example.com/forums/. Note that in this scenario, creating forum topics will have to be through BP Groups.

You can also do it the other way noted in the codex article, but the integration is not quite that easy I remember going through 28 steps or so for an external forum integration pre-BP1.2. In addition, bbPress is being converted into a WP plugin which will work well with BP sometime this year so there’s hope that there’ll be a “switch” so that forums won’t be dependent on BP Groups component.