I think that I would be able to partly help you out. I have some bad experiences using OAS though it was 4.0.8.2. If I can remember, first you have to stop the ows

owsctl stop

owsctl clean -force

owsctl start

owsctl start -nodemgr

The nodemgr option is the one that allows you to open the admin web page.

On coming to your second qustion, take a full back up your production database using Oracle Recovery manager (RMAN) using the recovery catalog and then do a duplication using RMAN on to your test system. There you are ready to roll. For more detail on the concepts of RMAN check
[url]http://technet.oracle.com[/url] ( do a search on RMAN).

I hope this would help you.

Good luck,
Sam