Pear SOAP questions...

Hello All, I have been messing around with the pear:soap implementation and had a few questions. First off is there a way to pass hashes or arrays as input variables via SOAP? Also how would they be represented via the dispatch_type? I tried setting up a complex type but that did not work at all. Also I was wondering if there was a way to use session data with PEAR:SOAP? I know ext/soap allows you to set a persistent or something like that. Anyway I have somewhat hacked my soap server to return session_ids and use session_ids as an input variable on every function but that seems a bit cumbersome. Anyway I appreciate any help you can give. Stefan