Thanks so much for the reply! When I woke up this morning, the idea came to me that if anyone had responded to my post, it would probably be you.
In honor of your response, I first went to your 'randomizer' tutorials in TNT 2. Great stuff, and very thoroughly explained. As I continue to use and learn more about LP8, it gets easier to understand, and it's worth repeating here that the vids and forums are a great help along those lines.
I've been experimenting with icons, and I thought I'd share what I've found, just in case someone else has a similar question.
First off, I wound up being able to answer my own question about 'logiconizer'. It is not necessary to have it. However, the site where logiconizer can be downloaded from does have many excellent icons. All that has to be done is to follow Martin's instructions from the above mentioned Logic 105 tutorial. The icons on the site;
are all ready to be used in LP8. Most of them have transparent backgrounds and they are all 128x128 pixels. They are arranged by category, and I recommend following those categories to anyone who thinks they may download a lot of the icons from that site. This will help keep things organized. The icons should be renamed with numbers before they are put into the 'Icons' folder. The original name can be retained, but what is necessary is to start the name with a three digit number (not sure if it has to be a three digit number, but that is what was recommended on the logicprofiles site, and it did work for me that way) different than the ones already installed in LP8. Keep in mind that the new icons will appear in Logic in the order that they were numbered, for organizational purposes.
Just to add something to Martin's instructions, which were for Logic 7 - if you installed LP8 and included the 'Legacy' content upon installation, then you'll have two folders in the 'Package Contents/Resources/Images/Icons' folder. One will say 'Icons', and the other, 'Legacy Icons'. Apple was pretty smart about numbering the new icons in LP8, because most of them have different numbers than the ones from 'Legacy'. So if you load the contents of the 'Legacy Icons' folder right into the LP8 'Icons' folder, you can have both sets at your disposal when using LP8. There were some duplicates, and I chose to not replace the new icons with the old 'Legacy Icons', of course, since in cases where there were duplicates, the LP8 icons were much improved over Logic 7's. If Logic is running when any new icons are loaded, you must quit out and re-open Logic for the newly added icons to appear.
And, Rounik, I will be trying Gimp - I read a little about it today, and it looks like that's just what I was looking for. I just hope it's not too complicated, so I won't have to 'gimp' through learning it!