different sidebars on different pages

Hi there,

My apologies if this has been answered; a search through this forum did not reveal an answer. I like the look of Atahualpa and it seems to be very flexible. Is it possible to have different sidebars on different pages? (not merely making the two sidebars visible/invisible on certain pages.) I've been reading through the WordPress for Dummies book which shows how to do this with the default theme editing sidebar.php, etc., but this doesn't apply to Atahualpa. If it is, in fact, possible, does it require hackery ? (IOW, is it worth it, or should I start from scratch <-- icky)

Many thanks for your help and for a great theme/community.

Best,

Scott