As far as instructions for replacement, Hunter has several files on their web site- look in this folder, there are 2-3 files that will help.
And if you click "parent directory" at the top, you will find a whole library of files related to the older Hunter boats, lots of good stuff there.
Finally, check your model number- the 260 was not made in 1996. That would have been the 26, and the front windows are very different. The 26 has a opening hatch as the center piece of the front window, the 260 does not.