Hi,
I had the same problem so I created a batch image converter to resize images, change formats, and change compression jpg's in my web development.

One other common problem of processing many images for websites is that you have to write a lot of mundane code for them. I added a feature to create the HTML for your images once they are processed. You can also automatically add links from the tnail to the larger image and have the option of using a popup or not.

You can download it for free at 21stsoft.com/products/index.asp#batch-image-converter
I couldn't use the complete URL because this was my first post.

Hope it helps...