Millisecond Forums

This is probably going to be a long shot but I thought I would give this a try. I would like to create an odd one out task, which would require to the participant to be able to identify which of three stimuli is different from the other two. For this I would require for three jpegs be shown on one screen in which two of them are the same and one is different (in which the location of the different image is randomized). As I am trying to detect a threshold, i would need these images to change depending on the response being correct or incorrect. Another issue is that i want to set it up so that i can make my stimuli at the full range of what the experiment is (make every item from 1-100) and then have inquisit randomly select one of these items, copy it for another face and then take the required difference in range for the difference in the staircase and make the third image there. For example, have a screen in which three seperate jpegs come up all next to each other in a row with two at the highest point in the range (100) and one at the lowest point (0), if the response would be right then that difference would go shorter, then requiring two stimuli of a random value (e.g. 75) and the third of a smaller range of the stimuli (e.g. 50 difference, meaning stimulus 25) all whilst the odd image out is being randomised between the locations. 

I know that it is not the most easy of tasks but the amount of coding and stimulus making i would have to produce if I cannot get three seperate jpegs would be a lot. I know this is a long shot and I am vary new to inquisit and coding so any instructions or advice would be majorly appreciated. Also if there suggestions of other ways to do something similar, I am more than happy to hear them out. I have looked at the staircase method that is in the examples but was not sure how to manipulate that to what I need.

Thanks