What are BCM folder names?

They are in BCMRes.dll. Run ildasm on that assembly. Look for Microsoft.BusinessSolutions.eCRM.Resources.IrisFolderName.Keys.
The string resources are named directly for the members of Keys. Keys.ContactFolder is "ContactFolder", the Outlook Message Store in Keys.MsgStore is "MsgStore" and so on.

The actual name strings are in the assembly resources. One way to look at them is to run .NET Reflector on that assembly. Look for Resource Microsoft.BusinessSolutions.eCRM.Resources.IrisFolderName.Resoures.

MsgStore=Business Contact Manager
ContactFolder=Business Contacts