Hi, wmike,
I understand you want to do something like this:
Here you just have to enter the image source into the answer options: (see 2nd screenshot)
This address (with placeholder {TEMPLATEURL}) is the default address if you use the template editor to upload.
If I misunderstood you and you want the pictures as answeroptioons in a grid question,
it's the same: you enter the image source into the answer options.
And if you want the pictures to be on the vertical side of the grid:
you enter the image source into the subquestions.
If I misunderstood you totally, I apologize.
But then please provide something like an example.
Best regards
Joffm
BTW: I had no other pictures for this examples.