Want to upgrade ram and OS on a pismo (400). Have read that Panther seems to be the best OS for it, and that while 1 gb is possible, seem to be some issues with one of the ram slots. Also have heard that pismo can be pretty picky with ram compatibility. Could anyone elaborate/advise on these? Where is good source for legal OS 10.3 at good price (other than ebay)? DMS for ram? Thanks.