We see alot of files from our clients here at InkFX and many times we have to crop the images supplied by our clients. It is always better for you (our clients) to crop your images exactly the right size you want before supplying it to us.
Here’s a little video on Cropping that might help.
Here’s another one below from someone else.
Here’s an Elements 9 Tutorial on using the Crop Tool:
Here’s another Elements 9 Tutorial on using the Crop Tool too! 🙂