@bowie960619 It's not a problem to get back to me now, or whenever. If you install Origin on the same computer where Sims 3 is, Origin may recognize the install and try to update it to 1.69 and take over. This used to happen to people even when they'd disabled auto updates, and it could happen to you as well.
It's possible that Origin would still allow you to use your existing packs, but there's no guarantee. You might end up having to wipe the Sims 3 install, and Origin, and start from scratch.
If you're up for a bit of experimenting, I have an idea for an approach you could try. I don't know if it would work, or if it would break your Sims 3 install (as in, you'd need to reinstall), but it's based on the fact that Origin doesn't recognize my own Sims 3 install at all. Mine is through Steam, and the install path and registry entries look different; I've wondered if that was why Origin never tried to touch it. So let me know if you're up for some messing around. But like I said, it might break your install.