I cut my programming teeth on our Vic 20, C64 and then Amiga 500.  Wow, what a machine!, just wish I could get some of my old programs off those single density disks!

I'm not sure which file is the default I beam, but I think you are looking for cursor functionality that is not possible by changing the cursor.  You seem to want the editor to decide where to put your cursor if you click on the middle of a character. right? You click in the left "region" of a character you want the cursor to move left.  You click the right "region" of a character you want the cursor to move right.  Does that explain what you are looking for? 

The image used as the cursor won't change how the editor handles text selection, it could only help you click... more precisely, perhaps.  Sorry I I misunderstood your earlier posts. :-[

kalos, try this "minimalist" horizontal beam for Text Select.  You'll need to save it somewhere on your comp first and then use Mouse, Pointer to browse for it.  (I had to zip it first, because its an ani file)

lemme know is this is helpful