I downloaded a set of picture frames (http://threadandsandpaper.dreamwidth.org/1871.html), 40 or so of them, slaved to a master. They wouldn't show up in game, so I opened a Master and a random slave in SimPE to look at them (sometimes creators put stuff in wrong categories so I wanted to know where to look for them). But they were in Wall hangings and Sculptures and I had none of them in my game.
Looking further I saw that both master and slave had in OBjectData / Catalog Sort 0.3 Catalog Sorting (0x0040 Valid EP flags) set to -32768 (decimal)! Just for test, I changed that number first to 0 and next time to 1 (alike other cc wall hangings i have) and both times they did show in catalogue with all 50+ recolors - allowing me to place them in game and have a sim go view them without problems.
My question is if that is safe (smart) thing to do? I wouldn't like game crashing in some crucial moment or corrupting the lot coz of couple of frames

Also, even when things work, I like to know why of it, so can someone please tell me what are the SimPE codes for EP flags?
And more, I am curious about the very first item in ObjectData/RawData, ie 01. OBJD File (0x0000 version_1-ReadOnly). Most of my cc have it as decimal 139 and 140, what's the difference?
Thank you

I'd take that back to the creator if they're still around and ask them about the settings. It might be an error but if everyone else DL the things and used them successfully, then the problem is likely with you.