Thanks geekmaster, just a few more clarifications:
1. No. You can copy the /usr/local folder from diags to main, as shown in the K4 Hacking wiki.
Can I just clarify, when you say K4 Hacking Wiki - do you mean here ->
https://wiki.mobileread.com/wiki/Kindle4NTHacking. I dont see where this is covered. Do you mind adding a link to the post to the page you're referring to?
2. You can put it in the documents folder.
After that, what do I do to run the kindlet?
3. Follow the instructions provided with other kindlets. Be sure to install the combined developer keystore, as shown in the K4 Hacking wiki.
Can you add a link to where you mean by "Follow the instructions provided with other kindlets"
Apologies if this makes you feel like a broken record.
Thanks, Ger