Well I used Photoshop for quite some time. But what I need won't cut it. What I need is exact dimesion (already made images) to the exact pixel. It would be reall nice if it can do serveal at a time. I am going to need about 150 images all the same size. Any suggestions for a good free or trial product?

Photoshop can automate the process for you. "Batch Processing"

You record your actions once. Then assign the action to a folder.

Take a look at this Tutorial.
http://www.cbtcafe.com/photoshop/batch/batch.html