put bbpress folder in
/wp-content/plugins/buddypress/bp-forums/
In wp-admin console (in web browser) go to buddypress>forums setup> and point to bb-config in bbpress folder you just installed.
Of course you will need to add your MySQL access details in bb-config.php
go into wp-admin and under buddypress, forums setup you will have to point to the bbconfig.php file.
