How to embed non square images in posts and pages

I have the pages plugin (1.9). It's fantastic in that it gives all the advantages of a wiki but much easier to use. There is one fact is the same problem as in the blog plugin and that is inserting/embedding images. I can only embed/insert square images. I have the tidypic plugin so I assume that the insert embed is a function of said plugin. I can go view the full size image in files but can't see it in a page or post. There are numerous tables I want to share but the truncated, clipped square image is unsuitable for such. Is there a way to work around this?