You can disable CTRL-ENTER in Outlook by adding the two following registry keys:
Key: HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\11.0\Outlook\DisabledShortcutKeysCheckBoxes
String Value: CtrlEnter
Value Data: 13,8
Key: HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\11.0\Word\DisabledShortcutKeysCheckBoxes
String Value: CtrlEnter
Value Data: 13,8
NOTE: I’m using Office 2003 = 11.0 (XP = 10.0, 2000 = 9.0)
From Microsoft:
Disable a Predefined Shortcut Key with a Policy Setting
In order to disable predefined (built-in) and custom shortcut keys for commands in Microsoft Office XP, you must know how to type the shortcut key ID into the System Policy Editor. Several built-in shortcut keys are listed in the Predefined category of most application policy templates.
To disable a predefined shortcut key with a policy:
1. Start the System Policy Editor.
2. Double-click the policy profile that you want to work with.
3. Expand the Office application node (click the plus [+] sign, or double-click the application name) that contains the built-in shortcut key that you want to disable.
4. Expand the Disable items in user interface node.
5. Expand the Predefined node.
6. Select the Disable shortcut keys check box.
7. In the Settings for Disable shortcut keys work area, select the check box next to the shortcut key that you want to disable.
For example, select the CTRL+K (Insert Hyperlink) check box to disable the shortcut key for the Hyperlink command (on the Insert menu) in Word.
来源: http://bhandler.spaces.live.com/Blog/cns!1pt1v0Q4vD8jSvNS4lqdAuug!303.entry