I tried that. Doesn't work. The few premium contents that work will only work with the ccmerged in the dcbackup folder

Not sure what I've done wrong, but...

I've followed KT's and nona's instructions to a Tee, downloaded the fixes and ccmerged as per instructions... some of my store content were fixed and worked as they should. others were not fixed. I use decrapped sims3packs.

I still get the white boxes with:
Titanic Toy Machine
Artisan's Glassblowing and Jewelry Making (Prism Art Studio)
It's Business Time Industrial Oven
Plants vs. Zombies Sunflower

Other problems:
Chun Co. Teppanyaki Grill - Sim can't prepare food
Classically Cool Fixer-upper Car - car disappears after sim fixes it
Dragon eggs - doesn't hatch
Milkin' It Dairy Corral - sim gets stuck playing tic-tac-hoof and won't do any other interaction
Tree of Prosperity - no fruit