1. Yes
2. Yes
3. It replaces all of the default saber types (short, long, double) as well as replacing the blade textures and makes them animated blades.
4. No, because these are not a new base item and only replace the default hilt models. There is an extra 'gold' saber included but uses the same base item and uti.
I would also like to mention here that my readme is not correct in that I said it dosen't overwrite files But it does in fact overwrite any default models and saber blade mods you might have in your override already.
I did that just so if there was any thing not specific to this mod in your override already, everything would still be of one mod, mine.
Now, that being said, any default blade color textures from VP's mod are going to be overwritten(blue, red, green etc etc), not his unique color textures. (pink, chartreuse, azure etc etc)..
If you want to keep his basic blade textures, my mod will have his original blade textures in its backup folder so you can just re-replace them.
I'm already looking at my viridian blade and going to work on it for a fix. its a bit too thin looking.
Also my readme here will be edited to reflect what I just said.