Are any modifications to the code required to roll a 6x version?

Hi, thanks for posting this module, its just what I was looking for. Only problem is I'm on 6.x. I've looked at the code, and at first glance it looks like it might work as-is as a 6.x module. Do you think this is the case, or are you aware of any coding changes that would be necessary (other than changes in the .info and .install files) to port the module to 6.X? If it's something simple, I would be willing to give it a try.