I don't remember when I DL'ed mine but it's been a while and it uses silverRefl.jpg (not pict) which is in the standard ones I think. Maybe he changed the file at some point. Everything loads in fine as is, even the camera which is nice. The textures come up in the appropriate places automatically. Load the classroom base then the front wall, then the corridor "rouka set". There are morphs to pull down the projection screen, open the curtain, and you can rotate the left door to open it out into the corridor where you can see the syoukaki (fire extinguisher. You can now put in student desk and chair(s) and the "rika chair and desk" (lab table). Add students (Two Sword, I think has great Japanese schoolgirl uniforms)and you're ready to educate or create naughty anime school tales as you wish. I think it should work fine added in any order though. The default lights seem to be too dark when you render and unfortunately I suck at interior lighting (exterior too for that matter). Two very quick and dirty pics.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken