Yep, likewise here. Win96 and Win92 both installed on two desktops and my laptop, as well as on a thumbdrive, so I never have to be without it.
In all four places, within the two program folders I have subfolders in which I keep updated copies of all my .spg and p96 files.
If you use more than one of those Win programs (-92, -93, -95, -96) be sure to also install his WinXX Data Converter, so you can convert the files between the different program formats. It doesn't indicate if it's compatible with Win97 or Win99... anybody know?
And when you DO get the Keycode, be absolutely positively sure to copy it and print it out in several places in case your machine crashes, you get a new computer, whatever. Don spends hours every week trying to retrieve peoples' "lost" keys. As he says on his website,
"When you register, you will be issued a unique key that will allow Win96 to run past its 30-day trial period. DO NOT LOSE THIS KEY. You will need it any time you wish to install Win96 (new computer, new operating system, computer crash, etc.). In many cases, we can re-issue a registration key upon emailed request, but this is not guaranteed and may not get you a prompt response."