Jason, I use a program called Picasa 3. It is a free download and, after you have scanned your chip, open it with the Picasa program, then choose "Edit in Picasa". This will put your scan in the program which has many features including a "Straighten" function.

I, too, have difficulty placing my chips "straight" on my scanner

Here's the link for Picasa 3.

http://picasa.google.com/

Hope this helps.

Rich