Personally i would recommend the following CRM product as it allows you the functionality of running within Outlook as a addin, Utilises an Outlook Data File/Personal Folder File (.pst) for data storage

MX-Contact is a CRM, Contact Management and Sales Automation package that runs inside Microsoft Outlook 2000, 2002 or 2003. The system utilises all the standard functionality of Outlook but provides many additional features that transform Outlook into a powerful Contact Management and CRM system.

The Personal Edition is the free Contact Management version of MX-Contact and is designed for a single user or small office/home office (SOHO). It is a Microsoft Outlook Add-In and runs off an Outlook Data/Personal Folders (.pst) file.

MX-Contact provides you with a system that allows you to manage groups, companies and contacts, and see all the interactions with these entities, namely appointments, tasks, e-mails, documents and journals. MX-Contact adds the relationship management (i.e. the linking of items to one another) that Outlook lacks by default.

http://www.exchangewise.com/Free_Contact_Manager.htm

Hope this helps,

Thanks

Rita