A question about image thumbnails/previews

[Webbstre]

Thanks! That covers 90% of what I was hoping for. Now, what do I do if I want to upload an image file of the same extension (jpg for example) that is larger?

For example, the info you gave me above lets me make vb resize the uploaded image to something smaller and easy for a user to load with the rest of the page, but if they click on the image I would still like them to be able to load the original file at its original size and dimensions in a new window. Is that possible?

Sorry if it sounds like I'm being picky, but this was all automatic when I used Wordpress X_X