Yes,site I linked to on the 1st post give a zip file of new sounds for the psr 1500, 3000, and the tyros. They will also work on my 2100 and probably on your 2000. They are not archived on the site however. You've got to download them weekly. Also know that they might not all be that great on your 2000 but you might find some that work well that you will like.
E-mail me and I will send you the zipped file of all the past "weekly free sounds"

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The old Newb