I would also offer the point that your commenting style's a little difficult to follow. Consider throwing a little more whitespace at this code to make it more readable. (For instance: When a variable has a sufficiently advanced use as to require a long comment, consider putting a blank line above and below it, to visually separate it from the rest of the variables.)

I realize that's not quite what needs to be done with the code, but believe me -- the easier your code is to read, the more likely you're going to get helpful responses.

In case you're curious, there is a largish list of recommended practices for whitespace, comments, etc. Nothing there is set in stone, but nobody will complain if you do the things it outlines. ;)

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You are what you think.