Strangetown, Veronaville and Pleasantview deleted themselves. / Nightlife corrupted again

[StarlightBeauty]

So, I have all the packs/expansions except Bon Voyage, Free Time, and Glamour Life. I recently received Seasons & Apartment Life, so the first thing I did was download them. (I don't ever make back ups) Then, I found out that Belladonna Cove and Riverblossom Hills replaced those three. (The only "expansion/maxis" neighborhoods I have are Belladonna Cove and Riverblossom hills.) I didn't care since I didn't do anything in the 3 main neighborhoods, so .. I want the three neighborhoods, but I don't want to lose Belladonna Cove and Riverblossom Hills. Can anyone explain why they just disappeared?
Also, Nightlife corrupted AGAIN one second after downloading it, when I didn't do ANYTHING. The templates come up as glitchy pieces of terrain (I'll get a picture later) so I haven't bothered adding downtowns and buildings other than homes. (So basically, all my templates are corrupting when I redownloaded everything on a new, fresh computer) Nightlife is fine when it comes to vampires and cars, though. What is wrong with my templates?
(P.S I got most of my stuff off of origin except for Open For Business, Nightlife, Pets and university)

[Mordant17]

About your neighborhoods: The neighborhoods installed by the later EPs will show up before the ones from the base game, so you need to click the right arrow to see the rest of your neighborhoods. If you still don't see them, check your neighborhoods folder folder for N001, N002 and N003 (Documents/EA Games/The Sims 2/Neighborhoods). Do they show up?

If you could post a screenshot of your terrain glitch, that would be helpful.

And now is a good time to start getting in the habit of making back ups (http://www.modthesims.info/wiki.php?title=Game_Help:Back_Ups).

[StarlightBeauty]

The towns were deleted. I see Belladonna Cove, Riverblossom Hills, and a bunch of custom neighbourhoods I made. Apparently this is a problem with a lot of people after installing Seasons. Still waiting for a fix on that. I /know/ someone gave out templates for the main three neighbourhoods, but I don't know where they would be. Besides wouldn't it overwrite Belladonna Cove and Riverblossom Hills since they are N001 & N002?
Does anyone know how I can take a screenshot of Sims 2 with Vista? On windows I could just use print screen, minimize, and go to paint. But when I try to do it with Vista I capture the desktop.

[Mootilda]

Belladonna Cove and Riverblossom Hills are not N001 and N002. They are E001 and G001. None of the shipped neighborhoods will overwrite another shipped neighborhood.

If you move your save game somewhere safe and allow all of the shipped neighborhoods to regenerate, are the missing neighborhoods now available?