The original code ships with the product and you can change the code there. It should be a simple case of changing a sign in the code. If you are using 2007 you can use the vbaide to modify the code. If you are using 2008 you will need to download vb.net visual studio express and make the revisions to the code, compile it and replace the shipped code with it or create a new file. The hardest part is to modify atc file if you create a new one and make sure everyone gets the revised code. There is a paper on the AU site and it is documented in the help, I don't remember if its the regular help or the API help.
http://www.microsoft.com/express/
Christopher
http://civil-3d.blogspot.com/
Civil Reminders
http://blog.civil3dreminders.com/
http://www.CivilReminders.com/
Alumni