Speak Waveguide Tutorial?

Hi,

Can anyone point me to a tutorial on designing a waveguide in Speak (Earl Gedds software)?

I've had a look through the manual for download on Gedds website but it doesn't give much detail about making waveguides. In the software if I click on the waveguide option in the enclosures dialogue it says 'select a waveguide from the list or make a new one in the waveguide designer'. Where is the waveguide designer?

[IMGDEAD]http://s4.postimg.org/5jjygcsfh/waveguide_dialoge.jpg[/IMGDEAD]