Hi MQ,
CRM integration normally done by basis team with help of crm team. if you missed any business content related extractors and patches/updates form your source system, please inform the crm team, they will help you with help of basis team.
Once you got business requirement, check with available business content CRM extractors and find the suitable one. if doesn't match then go for generic concept.
Installation from business content(ECC Tx - RSA5, under CRM application component) and replicating into bw side and remaining steps may be well know to you as we for other data sources.
http://help.sap.com/saphelp_crm52/helpdata/EN/47/0441418e998739e10000000a1550b0/content.htm
As my guess you may need to use master data attributes and as well text data sources(CRM).
Thanks