1. The version you have is the free version. The advert is there to convince you to register. You shouldn't need convincing though... go out there and register it!
2. Not entirely sure what you mean here... All you need to do is download the whdload package from www.whdload.de
and install it in workbench. After that it's just a matter of
A. Installing the games using the corresponding installer for each game using original disks (real amiga)
B. Installing the games using the corresponding installer for each game using CAPS Images (WinUAE)
C. Download the full games installs and unpack them to a directory and run!
Bear in mind that some games (very few) do not work without registering.
There is a great whdload tutorial with a LOAD of info on whdload if you look in the FAQ section of the site. (If you are lazy just click here... http://eab.abime.net/faq.php?faq=hdg...q_cody_whd_faq