How to attach database files to sql
From the command line:
OSQL -E -S .\mssmlbiz -d master -Q"CREATE DATABASE MSSmallBusiness ON (FILENAME = 'C:\Documents and Settings\luther\Local Settings\Application Data\Microsoft\Business Contact Manager\MSSmallBusiness.mdf') FOR ATTACH"
You will need to adjust the server\instance name to your instance; e.g. the default name with BCM v2 is microsoftsmlbiz.