white95v6 - After you're logged into one of the controllers, look for the "Advanced Measuring Blocks" button. This will give you a full list of measuring blocks supported by the controller. You can mix and match from the list (clicking the check box to the left of the measuring block).
You can save the list of measuring blocks so that you can reload them any time from the advanced measuring block menu. Right click the VCDS logo in the upper left corner of the measuring block selection window to save / load block lists.
Here is part of what the advanced measuring block selection window look like. The window has a scroll bar on the right side.
If you can't figure this out post more help requests. I'll try to do screen captures when I can connect up to my car. What you are describing in your post is logging using basic measuring blocks. Basic Measuring blocks are grouped sets which seem specific to certain diagnostic procedures.
Here's a link to Ross-Tech that talks about Advanced Measuring Blocks:
http://www.ross-tech.com/vag-com/tour/adv-meas-blocks.html