Hi
Table RSPCCHAIN gives you the list of all chains.
The small piece of code in the link will give you the list of scheduled chains.
http://scn.sap.com/people/uday.pothireddy/blog/2009/11/18/list-of-scheduled-process-chains-in-sap-bw
Remove the scheduled chains from RSPCCHAIN table entries, which gives you the unscheduled chains.
Rgs
Chandra