Re: WordPress + bbPress Integration 101
To install in the same database, you just specify that database’s connection details in bb-config.php. The important thing is to be sure you use a different table prefix for the bbPress installation. By default, it’s bb_ for bbPress and for wp_ for WordPress. Use different table prefixes and you can install as many applications into one database as you want. Just keep the table prefixes unique.
To uninstall, yes, just delete the directory with bbPress in it, then drop the bbPress tables from the database. DO NOT delete the database since you have WordPress in that database as well, right?
You’re probably overthinking it. Using the same database is how the bbPress directions are written now; I think it’s assumed. The key is to just keep the table prefixes unique and you can put as much stuff in one database as you want.