Internet Explorer Registry Hacks::

Many of these Internet Explorer settings can be configured through an IEAK script or Group Policy. But sometimes it can be useful to know how to set them directly in the registry also.

Clear Temp Internet Files on Exit
Hive: HKEY_CURRENT USER
Key: SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache
Name: Persistent
Data Type: DWORD
Value: 0

Disable Active Scripting for Internet Zone
Hive: HKEY_CURRENT USER
Key: Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
Name: 1400
Data Type: DWORD
Value: 3

Disable Scripting of Java Applets for Internet Zone
Hive: HKEY_CURRENT USER
Key: Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
Name: 1402
Data Type: DWORD
Value: 3

Add ‘Trusted’ Domain
Hive: HKEY_CURRENT USER
Key: Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\domain.com\www
Name: *
Data Type: DWORD
Value: 2

Set IEAK Autoconfig Script Location
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows\CurrentVersion\Internet Settings
Name: AutoConfigURL
Data Type: Reg_SZ
Value: http://intranet/ieak.ins

Set Proxy Server
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows\CurrentVersion\Internet Settings
Name: ProxyServer
Data Type: Reg_SZ
Value: PROXYSERVERNAME:80

Set Proxy Exceptions
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows\CurrentVersion\Internet Settings
Name: ProxyOverride
Data Type: Reg_SZ
Value: *.microsoft.com;*.myitforum.com

Set Home Page
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Internet Explorer\Main
Name: Start Page
Data Type: REG_SZ
Value: http://www.homepage.com

Set Outlook as Default Email Program
Hive: HKEY_LOCAL_MACHINE
Key: SOFTWARE\Clients\Mail
Name: (default)
Data Type: REG_SZ
Value: Microsoft Outlook

Override Default Cookie Handling for a Web Site
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History\domain.com
Name: (default)
Data Type: DWORD
Value: 1

Disable Autocomplete for Form Passwords
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Internet Explorer\Main
Name: FormSuggest Passwords
Data Type: REG_SZ
Value: no

(my IT forum 2 wiki)