Yes, please do. Just register and then select 'I'll volunteer' I can then give you write permission...
If you're using a package anyway, even if you can't test all of it, you'll probably find you're covering off at least a few of the tests (and hopefully helping us to create a complete list too).
As a more general note, to anyone else reading this, if you are using a package at the moment, the I'd greatly appreciate you taking the time to record things you do (test types) and what happened when you tried to do them (test results)..
In this way your efforts indirectly help the OpenACS too.
We get to build up a full list of possible tests over time as a by product.
Cheers
Simon