DOW, WA, DC wont install!!

[Hopit]

so i have dow, wa, dc and ss, but only ss install. when i try to install there games that play game (and so on) and when i try to uninstal there comas that the game isn't installed!!! help me ,plz

[Kapp'n]

Have your tried uninstalling from the uninstaller.exe in the install location?
You may need to erase some traces of the game from your registry.

[Hopit]

i tried that uninstaller.exe, but it didn't work and how i can erase and what?