The part of programming that threw me to begin with was the default to scan list 1 and how to change it.
When you start a new object, the 'scan list' in the menu shows "*1"
Press the 'select' button to turn the "*" off.
Press the arrow (left or right) to move to the scan list number you want and press 'select'. The number will go from "#" to "*#".
Then continue entering data.
One thing I have started doing, especially for trunked systems, is this.
The second menu item for a new TGRP is TSYS. Even if I select NEW from the menu, I find some previous value in the TSYS location. If this occurs, press DFLT so the TSYS says "new".
I know that Don Starr has made a point of this when I posted this previously. See his post
http://www.radioreference.com/forums/showpost.php?p=629849&postcount=39
When I have NOT changed the TSYS value in the NEW TGRP menu, I overwrote the existing TGRP. Now I will admit as I look back, I don't recall whether or not I changed the TSYS name when I was adding a new system. I'll need to check that or have someone update this here.
Regardless, when I pressed NEW and already had a TGRP in existance, the one that was there would be overwritten if I didn't press DFLT to clear the TSYS value. So I am being a bit over cautious.