I am fairly certain
SPB Imageer is what you want.
I move my CF card full of pictures taken at full resolution from my 5 MP camera and view them with Imageer. They're close to 2MB in size. In fact, I then use Imageer to batch process them which makes a copy to my SD card and optimizes each pic for mobile viewing.
It's one of the more powerful PPC apps out there. Definitely check it out.