Just to have it in the air within this discussion.
You can also use the Stored Process sessions (http://support.sas.com/rnd/itech/doc9/dev_guide/stprocess/sesssamp.html). A macro variable (_sessionid) you need to pass through your pages (as a GET parameter). All pages which have the same _sessionid can share the libref called SAVE, and all datasets created in it. This library is temporary, as session expires after (by default) 15 minutes.
If any of the SAS experts are there to correct me, please do.
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