I might as well drop my question in here.
I bought my copy from Humble Bundle, so it's the Starter Pack (Base Game + Late Night + High End Loft Stuff). Is the downloadable version compatible with CD versions of EPs and SPs? If so, do I have to install such versions from CD or register them in TheSims3.com and thus download from Origin? Does anyone have any experience? I'm curious, because here in Finland you find some EPs and SPs really cheap in some bargain boxes, like 5€ - 15€. And even with regular prices the CD versions are usually cheaper than the downloadable versions, for that matter.
Also, my girlfriend has bought some EPs (all are on CDs), would I be able to install and use them on my PC, too? I'm not sure if she's registered all or any of them, and I can't ask her right now