you know, I would still consider doing as suggested earlier as something is not right in there...but if you don't want to, I guess it's not worth getting worked up over.
as for sims, without the cd, you will need to do it manually.
I cannot recall exactly where Sims installs...c:\program files\sims or c:\program files\eagames\sims or something else. I know you can easily find it by how much space it takes up using a program like spacemongerhttp://www.sixty-five.cc/
after you remove the files, you can remove the entry in add/remove control panel by opening the registry editor
start > run
HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Uninstall
beneath here you will find a key for the SIMS, just right click the folder and choose delete.
Finally, start > all programs, and right click the SIMS folder in your start menu
This will remove almost everything from the sims...it sprinkles some registry settings here and there, and a few files in c:\windows\system32, but they will be basically inactive and will not cause you any grief beyond taking a little space.