Problem: Sybase, PHP and multiple result sets

I have started working with Sybase lately, and it has come to my knowledge that a single query can return multiple result sets in Sybase, especially when using stored procedures. Now, in ASP (sorry...), there are calls that allow retrieving the next result set from the current result set. So in effect the result sets are a linked list and you can access all of them. In PHP, however, the result set returned is the first one, and I don't see any method for retrieving the next result set. Does anybody know of such a method? Does anybody have a suggestion for workaround? Basically, in most of these cases, the important result set is actually the last one, not the first, as the intermediate result sets are mostly temporary results. Herouth