I can't open a texture I extracted using Photoshop, it says "cannot complete request due to disk error"; oddly enough. Paint.NET opens it but it looks completely wrong, it's not 1x1 in dimensions and only the top 3rd of the canvas has something in it.
Any idea what I'm doing wrong?
Do you get any error messages while extracting the texture files? I looked up the Photoshop error and it usually comes up if the filing system is corrupted in some way. Try running CHKDSK /r as an administrator to check your filing system is OK.