Re: How to link up each module?
Yes, your are right:
Simply hold Ctrl - then left click on the source module's titlebar (a cross will appear). Then click the target module that you wish to route the signal to.
More info can also be found in the F.A.Q.: http://karmafx.net/?id=3
, but don't hesitate to ask if you have any further questions.
PS: you can also connect several modules in a row this way, by keeping Ctrl pressed while clicking on each module - one at a time.