As long as you have some experience with Spring Integration, all the pieces are there. See RemoteChunkStepIntegrationTests-context.xml.
Chunk requests are put on a channel 'requests' and chunk responses are put on a channel 'replies'. To actually remote them, simply add a pair of JMS channel adapters on each channel. For example, on the client side, subscribe to 'requests' with an outbound channel adapter, on the server side use a message-driven inbound adapter to receive the chunks and put them on the requests channel. Do the reverse for the replies.
It looks like the other poster took another path and modified the java code, rather than just modifying the Spring Integration configuration.
You might also want to look at the partitioning examples because they avoid sending the items over JMS.
Gary P. Russell
Spring Integration Team
SpringSource, a division of VMware