I use S2V on my phone and it makes it super easy to change the S2U2 pic as there is an option for changing it when you click on pic in S2V
Here is a link to check it out, I use it when viewing a lot of pics as HTC Album is too slow for me.
http://forum.xda-developers.com/showthread.php?t=358187 Just make sure to get the 3rd file as its VGA