I managed to override it after some trial and error.
I tried to update
my bed motive fix for Teen Goth Bed to FreeTime. This fix contains overrides for OBJD and BCON entries. For some unknown reason, 3rd party overrides for OBJD work only in Downloads folder, whereas overrides for anything else work only in Overrides folder. Meaning that I had to split the fix into two parts, one for Overrides folder and the other for Downloads folder. (Gah!)
I don't know why it didn't work the first time around. Might be something like wonky file lock-up. After reboot, I was able to make an external override package, albeit in a very complicated way.
Sooo... they update TSS things, but leave out FFS and GLS?
Only if you can count such a lame half-assed job as "update". Teen TV doesn't have "Tinker" option. Teen Vanity and Teen TV have annoying mouseover tooltips in Live Mode, which can be found only in some very old custom objects. I'd rather trust various modders to update SP objects than counting on EAxian sloppiness.
I'm working on a quick fix for this stupidity. Fix is now available at MTS2.AFAIR FFS objects were already updated by Pets.
GLS objects were updated by jfade. I have a couple of similar mod in MTS2. Check out my sig.