Due to my n00biness in Windows and how its compilers work, I've only tested it under Ubuntu and Maemo, however, it should work fine on Windows (GUI starts, but I couldn't get make_self_npdrm.exe compiled so I left it).

.deb files available for linux, these contain everything you need to use the GUI, shortcut would be in Applications -> Accessories.

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i386 for x86/32-bit, AMD64 for 64-bit, armel for the N900 (and possibly other linux-running arm boards).

Exe file for windows:

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You need to get make_self_npdrm.exe yourself, and of course, have its required libraries in the same directory, need to learn how to use Windows Installers which I can't be arsed to do

And of course, what good is software when it's closed source, source is on gitorious, here:
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Thanks to geohot for his ps3publictools source