As far as I'm aware, the admin rights are only used to write to the program files, I think this is probably inherited from older software when that was the norm.
I believe you need to set both the mapeditor and the FPSCreator EXE's to admin - you can do this in properties so you never have to again.
I know in classic the model pack's (both TGC and independent) installed to program files as well, so updating it then would have resulted with the media in both places - which is confusing. I have to admit, save applicaition files I never use Documents any more, everything builds up on the desktop until I file it away on the external! (Bad practice I know, I end up with too many "misc" and "desktop" folders
)
It would certainly be an advantage to have the main user editable files in documents (scriptbank, entitybank, etc.) as this would make the updating of things far quicker, I have to edit scripts on desktop and copy back.
But please please, do not put this stuff in appdata! I find that very annoying, as hidden by default when I wipe my PC to refresh/upgrade/whatever I always forget to back it up and loose countless save files... I wish the folder was visible to start with!
It would be handy to shift to Documents soon if this is to happen though, before there are installers for addons/etc. using the C: directory.
Custom Mac Pro (2014): OSX 10.9 (Mavericks) and Windows 8.1 Pro: Octa-threaded Xeon E5 v2 @ 3.7Ghz [9775]; Dual AMD FirePro D500 (3GB VRAM Each) [3769]; 12GB RAM [2517]; 512GB SSD [9074];
At the detected score [passmark 9074], my SSD is ranked 3rd of all SSD's in the charts