It took much less than what I expected, so here's the SBC Institute ready for download.
I took down some Custom Content I considered superficial and replaced it with Maxis content. I also deleted all the recolors I used, so I suggest you to get the medical posters from Lethe_s (at MTS2) if you want the medical lab to look like the pictures from the last post. Also, for some reason, the Re-Nu-Yu Machine disappeared when I packaged the lot, so if you want to, you can replace it on the Engineering lab.
Other than that, the changes are barely noticeable. And contrary to what I suspected, it is only a couple MB heavier than Belladonna High :).
You can find the updated preview pictures and the download link at Garden of Shadows (I'm not re uploading the pics here because Photobucket is being annoying lately, so I better save the bandwith :S).