There is a set of instructions that tells you exactly what you need to fill in, which I followed.
VB User ID: (The computer ID of the default username you want to use i.e. 1)
VB Username: (The actual username of the default username you want to use i.e. admin)
VB Forum ID: (The computer ID of the forum you want to place the thread i.e. for General Discussions, yours could be 6?)
Forum Url:
http://gurusecret.info/vbforum
Forum Relative Path: /vbforum
Database Prefix: You need to check the actual database ... i.e. vb_