: I am experiencing the endless looping on the main worksheet, as
: the subroutine tries, over and over, to place the images  it grabs
: into the cells  they are supposed to go into.
:
: It runs like this for quite a long time until, finally, it
: terminates with an error message that says, in essence, "out of
: stack space."
:

Sorry. I just don't see anything wrong  with the sub routine. I
wouldn't have written it that way, but it doesn't look like it should
loop endlessly.

Try commenting out every line and run the script. If the problem
stops, try adding them back in one line at a time. Each time you add
a new line in, run your program. Eventually, you may isolate the
offending line and get a better grasp of the problem.