Well, if you are indeed level 2 certified, then you should be able to download the guide from the Philips site. Just click the ProntoScript icon from Philips' main page and the login with your user account/password. On the right, you should see a link to download the dev guide...
With regard to using PS_VOLUME, again, if you are certified, you can download some scripts from the from the Philips site and review them. Start with the receiver scripts.
And, since, above, you mention being lazy. What is stopping you from searching this site for:
Developer Guide? At the time I write this, the link below is the 4th or 5th thread in the list.
[Link: remotecentral.com]