Guaranteed onetime Delivery in the absence of ATC in webMethods 60

Dear Friends,
Can anybody implemented Guarnateed one-time delivery in the absence of ATC Adapter in webMethods 6.0 when interacting with JDBC Adapter 6.0. The IntegrationServer 6.0 provides out-of Box support for one-time delivery by setting “Inbound Client Side Queuing= On” but this option will not helpl when we are going for Clustering where we have to keep
“Inbound Client Side Queuing= Off”
Any thoughts on this.