following instructions found in Vibe 3.4 Developer Guide, I've just created extension including (among others) one picture and java class (source).

The problem is to use/access its contents. I'd like to use java class in my custom JSPs but I can't see the way.

Manuals say a lot about extensions but are completely quiet about how to use (access) them.
Or there is something wrong with me :-)

Thanks in advance.