I'm editing my answer because I just read your latest edit to your question. Seems you finally got it to install correctly but your lots still are not showing up. The following link explains what you will need to do to get the lots to show up:
http://www.sims2wiki.info/wiki.php?title...
Skip over the section that says to Reinstall and read the section called Force Install. I ran into someone on EA's bbs where she and I both searched and searched for an answer to her problem installing lots and she finally found the above link. She gave the link to me so if I ever ran into anyone else having the same problem, I could give it to them. She told me that it worked for her and now her lots show up in her game.