1. FAR+SEFP tutorial: DB2010 cid49 with Far + SEFP, Tested with k750
XS++ v3.x file upload/download tutorial: [GUIDE]File uploading tutorial using XS++ v3.0 or V3.1. These tutorials are in Tutorials & Guides section...
2. Exactly.
3. Good analogy :D. Basically this is the point.
4. They(network operators) somehow compute an unlock code(some sort of hash code) based on your phone's IMEI, and you can input that code in phone(you can access the menu with <**< key combination). If the code is good, the phone will update the network locks located in GDFS with the "unlocked" one, so the phone will allow you to use any SIM card.
5. I studied IT enginering.
The advanced SE phone hacking(patch porting etc.) is just a hobby of mine, and I started it in a few months ago, so I'm a noob :)
6. I published only this one so far. I planning to make other tools too, but don't know when, because I don't have much free time.
The "other stuff" are the patches. You can find a lot of them for your phone...
I'm glad to hear that you succeeded :)