Unfortunately there is little point in having the Android Market on the NOOKclassic, because the majority of the apps on there are designed for LCD based screens, not eink and therefore the refresh rate isn't fast enough.
Kindle for Android isn't optimized for a NOOKclassic, and I tried an APK of it awhile ago, which it refused to install with a generic "Could not install on this phone" message.
Even if it would install, it would be quite difficult to control without a computer and VNC, thereby degrading the point of even putting it on there. All these apps are touch-optimized too, meaning without the full sized touchscreen you can't control anything apart from what lands on the colour LCD part of the NOOK.
Unfortunately, the only thing you can really do is crack the DRM off the Kindle books, but as noted by many others on the boards, we aren't allowed to share any links or information about circumventing DRM. However, Google is your friend
So, by all means try and run the script, it might even work, but there is little to no practical use of the Android Market on the NOOKclassic...
Hope that helps,
firefox