You ask a lot of questions at the same time.
Why do you use dropbox? You can easily attach images and files to posts.
1. First explain what you mean with "I was hoping to find a firmware/mod I could use, as I don't like the one that comes with mine". Do you want it pink, or "super hero" styled icons? Please explain what you want.
2. Do you have a Tesla style unit or a rotable screen? If it is Tesla system, why do you want landscape? And if it is rotable, does it not rotate automatically? Next to that: On a Tesla style screen you can also use the split-screen function, to do an top-bottom split.
3. There are modded firmwares, not custom firmwares. See the "PeaceOS" thread about the modded appplication layer from
@LLIyT_HuK .
4. You are posting in the Joying Extra Tools thread. That one is for older units.
5. HWGetInfo.apk is a general purpose apk, that will work on any FYT on any Android version (so far). HWGetInfo "gets info" about your unit.
5. Your packed zip ("my own zip") contains part of a firmware, namely the application layer. What is it that you want?
2a. The "ro.sf.swrotation=270" gives the rotation of the unit. This 270 value normally indicates it is a Joying unit or a Tesla unit. If you change this value to 90 or 180, your screen will rotate.