For launcher, it's probably best to not create .bin files (launcher extensions only need to be copied into the extensions/ folder of the USB storage, which is accessible anyway). "Real" installers are only required for hacks which need to modify the filesystem outside of the USB storage, where it's not "normally" reachable by the end user.
To clarify this again (just in case): the only accessible directory, for "normal" users, is /mnt/us/. Anything that needs to go somewhere else than that directory needs special care (like installers etc.) Conversely, anything that only needs access to this directory can be installed just fine by the average Windows user, by just dragging that one symbol to that other symbol, assuming that the instructions are really foolproof enough.
That said: You are of course very welcome to plunge into the "mechanical gears" of the system (that's where the real fun is... quite simply *because* it is challenging and tricky), and to try out kindletool etc. for yourself... Welcome to the "geeky" side of mobileread!
