How To Install Store Items

That's an awesome goal @simrhino! Valgon57 put together a great database organized by types and let me use whatever I wanted from his work. So, I added everything into my database with links in the first post. Here's what I see from the free category tab:
sims3://download/?ofbId=OFB-SIM3:35749 Rockin' Out Aerobics Leotard
sims3://download/?ofbId=OFB-SIM3:35750 Home on the Range Grill
sims3://download/?ofbId=OFB-SIM3:35751 Hive of Knowledge Bookshelf
sims3://download/?ofbId=OFB-SIM3:35752 Sleek Intellect 5010
sims3://download/?ofbId=OFB-SIM3:35753 Rustic Staycation Whirlpool Station
sims3://download/?ofbId=OFB-SIM3:35754 Go Team!
sims3://download/?ofbId=OFB-SIM3:35755 Lost My Homework Graphic Tee
sims3://download/?ofbId=OFB-SIM3:18099 Not-A-Street Floor Lamp
sims3://download/?ofbId=OFB-SIM3:18101 Generation Clock
sims3://download/?ofbId=OFB-SIM3:18102 Byron Desk
sims3://download/?ofbId=OFB-SIM3:18103 Deco Tank
sims3://download/?ofbId=OFB-SIM3:18450 Tomb Sled Sleeper
sims3://download/?ofbId=OFB-SIM3:18489 The Desert’s End
sims3://download/?ofbId=OFB-SIM3:18564 Paris Wall Clock
sims3://download/?ofbId=OFB-SIM3:18620 Modern HDTV by Webbsta Industries
sims3://download/?ofbId=OFB-SIM3:18684 The Sleeker-Sleeper
sims3://download/?ofbId=OFB-SIM3:18701 Cellar Arch
sims3://download/?ofbId=OFB-SIM3:18852 Perfecto Presto!
sims3://download/?ofbId=OFB-SIM3:21819 Honeycomb Bookshelf
sims3://download/?ofbId=OFB-SIM3:50711 Lunar Lakes Rock
sims3://download/?ofbId=OFB-SIM3:50395 Katy Perry Poster
sims3://download/?ofbId=OFB-SIM3:68587 The Sims 4 Poster
sims3://download/?ofbId=OFB-SIM3:19056 New Year Hat for Her
sims3://download/?ofbId=OFB-SIM3:19064 New Year Hat for Him
sims3://download/?ofbId=OFB-SIM3:19578 Fiona
sims3://download/?ofbId=OFB-SIM3:19505 Just in Jest Hat (F)
sims3://download/?ofbId=OFB-SIM3:19506 Just in Jest Hat (M)
sims3://download/?ofbId=OFB-SIM3:20897 Diva
sims3://download/?ofbId=OFB-SIM3:21403 Lucky Duckie (AM)
sims3://download/?ofbId=OFB-SIM3:21404 Lucky Duckie Jr. (CM)
sims3://download/?ofbId=OFB-SIM3:21505 Lucky Duckie Jr. (CF)
sims3://download/?ofbId=OFB-SIM3:37572 #1 Fanatic
sims3://download/?ofbId=OFB-SIM3:22676 Happy Holiday Presents Collector's Edition

Here's a link to a free thread for you as well:
https://forums.thesims.com/en_US/discussion/580940/the-sims-3-free-store-items-a-list

And here's more lists with pictures to help as well:
https://www.carls-sims-4-guide.com/forum/index.php?topic=18326.0
https://simsvip.com/sims-3-store-content/freebies/
http://beyondsims.com/the-sims/the-sims-3/free-store-content/