Knowledge Management

Question:
I searched for an answer here on SAP Fans but could not find one, so I'll ask the question:
1) I want to provide client specific, context sensitive application help in addition to the standard application help (Menu: Help >> Application Help).
2) I want this help to be available via a menu option (Menu: Help >> ABC Application Help) and via the right-mouse click context help.
3) I want this help to be sensitive to the logged on user (possibly through the use of the 'User Group' in the User master). This is because I have several businesses on the one instance that have customised versions of their end-user help, and want the user to get their own version of this help.
Any help on 'Help' would be appreciated.
Answer:
do you mean 'Client Specific' as in SAP client, or as in customer.
Paul
Answer:
Sorry,
yes I meant:
Customer, context sensitive help.