I unistalled CIV4 + all exp. packs by deleting the main files from ".../Program Files/Firaxis Games/Civilization

I know that was a stupid way to unistall the game, but I was rushed on time.

Then I deleted the game's registry values.

But now I want to reinstall it, and it keeps telling me that I already have it installed. If I deleted its registry values, then why does it keep telling me that I already have it installed?\

Help?

delete everything you have not already done in the below list (it is a reinstall howto just in case ;) - also if deleting the crypitc folders listed below does not work - search for those values in the registry and delete them there.
Welcome to CFC :)


install the most recent version of DirectX 9c from Microsoft (http://www.microsoft.com/downloads/details.aspx?FamilyID=2da43d38-db71-4c1b-bc6a-9b6652cd92a3&DisplayLang=en)

then do the following for a clean reinstall:

Uninstall and Reinstall Civ4 Warlords BtS :

Try to follow this order when doing stuff:
Use Control panel to uninstall Beyond the Sword, then Warlords, then Civ4
Delete "...\documents and settings\<username>\my documents\my games\sid meier's civilization 4" manually
Delete "...\documents and settings\<username>\my documents\my games\warlords" manually
Delete "...\documents and settings\<username>\my documents\my games\beyond the sword" manually
Delete "...\documents and settings\<username>\application data\my games\sid meier's civilization 4" manually
Delete "...\documents and settings\<username>\application data\my games\warlords" manually
Delete "...\documents and settings\<username>\application data\my games\beyond the sword" manually
Delete "...\documents and settings\<username>\local settings\application data\my games\sid meier's civilization 4" manually
Delete "...\documents and settings\<username>\local settings\application data\my games\warlords" manually
Delete "...\documents and settings\<username>\local settings\application data\my games\beyond the sword" manually
(note: application data is a hidden directory so you need to configure windows explorer to show hidden files, also these directories in application data are sometimes removed by the uninstall routine)
Delete "...\Program Files\InstallShield Installation Information\{CFBCE791-2D53-4FCE-B3FB-D6E01F4112E8}" (Civ4)
Delete "...\Program Files\InstallShield Installation Information\{3E4B349F-10B5-4586-9D99-489A90A8B228}" (Warlords)
Delete "...\Program Files\InstallShield Installation Information\{32E4F0D2-C135-475E-A841-1D59A0D22989}" (BtS)
(note: InstallShield Installation Information is a hidden directory so you need to configure windows explorer to show hidden files).
Install Civ4, immediately patch it to 1.61 (download it fresh from here (http://forums.civfanatics.com/downloads.php?do=file&id=3))
Install Warlords, immediately patch it to 2.08 (download it fresh from here (http://forums.civfanatics.com/downloads.php?do=file&id=3344))
Install Beyond the Sword, immediately patch to 3.17 (download it fresh from here (http://forums.civfanatics.com/downloads.php?do=file&id=9800)).