How to enable unsafe attachments in MS Outlook

You can find the original Microsoft kb here:
http://support.microsoft.com/kb/829982

1. Quit Outlook if it is running.
2. Click Start, and then click Run.
3. In the Open box, type regedit, and then click OK.
4. Verify that the following registry key for your version of Outlook exists. If it does, go to step 5.

Microsoft Outlook 2000:
HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security

Microsoft Outlook 2002:
HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security

Microsoft Office Outlook 2003:
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security

If the registry key does not exist, create it. To create the registry key, locate and then click the following registry key:

HKEY_CURRENT_USER\Software\Microsoft

a. Click the Edit menu, click New, and then click Key.
b. Type Office, and then press ENTER.
c. Click the Edit menu, click New, and then click Key.
d. Type 11.0, and then press ENTER.

Note This is the correct name if you are using Outlook 2003. If you are using Outlook 2000 or Outlook 2002, you will have to type "9.0" or "10.0", respectively.
e. Click the Edit menu, click New, and then click Key.
f. Type Outlook, and then press ENTER.
g. Click the Edit menu, click New, and then click Key.
h. Type Security, and then press ENTER.

5. Click the Edit menu, click New, and then click String Value.
6. Type the following name for the new value:Level1Remove
7. Press ENTER.
8. Right-click the new string value name, and then click Modify.
9. Type the file name extension of the file type that you want to open in Outlook. For example:
.exe
To specify multiple file types, use the following format:
.exe;.com
10. Click OK.
11. Quit Registry Editor.
12. Restart your computer, or just restart MS Outlook.

When you start Outlook, you can open the file types that you specified in the registry.

File extension	File type
.ade	Access Project Extension (Microsoft)
.adp	Access Project (Microsoft)
.app	Executable Application
.asp	Active Server Page
.bas	BASIC Source Code
.bat	Batch Processing
.cer	Internet Security Certificate File
.chm	Compiled HTML Help
.cmd	DOS CP/M Command File, Command File for Windows NT
.com	Command
.cpl	Windows Control Panel Extension (Microsoft)
.crt	Certificate File
.csh	csh Script
.exe	Executable File
.fxp	FoxPro Compiled Source (Microsoft)
.hlp	Windows Help File
.hta	Hypertext Application
.inf	Information or Setup File
.ins	IIS Internet Communications Settings (Microsoft)
.isp	IIS Internet Service Provider Settings (Microsoft)
.its	Internet Document Set, Internation Translation
.js	JavaScript Source Code
.jse	JScript Encoded Script File
.ksh	UNIX Shell Script
.lnk	Windows Shortcut File
.mad	Access Module Shortcut (Microsoft)
.maf	Access (Microsoft)
.mag	Access Diagram Shortcut (Microsoft)
.mam	Access Macro Shortcut (Microsoft)
.maq	Access Query Shortcut (Microsoft)
.mar	Access Report Shortcut (Microsoft)
.mas	Access Stored Procedures (Microsoft)
.mat	Access Table Shortcut (Microsoft)
.mau	Media Attachment Unit
.mav	Access View Shortcut (Microsoft)
.maw	Access Data Access Page (Microsoft)
.mda	Access Add-in (Microsoft), MDA Access 2 Workgroup (Microsoft)
.mdb	Access Application (Microsoft), MDB Access Database (Microsoft)
.mde	Access MDE Database File (Microsoft)
.mdt	Access Add-in Data (Microsoft)
.mdw	Access Workgroup Information (Microsoft)
.mdz	Access Wizard Template (Microsoft)
.msc	Microsoft Management Console Snap-in Control File (Microsoft)
.msi	Windows Installer File (Microsoft)
.msp	Windows Installer Patch
.mst	Windows SDK Setup Transform Script
.ops	Office Profile Settings File
.pcd	Visual Test (Microsoft)
.pif	Windows Program Information File (Microsoft)
.prf	Windows System File
.prg	Program File
.pst	MS Exchange Address Book File, Outlook Personal Folder File (Microsoft)
.reg	Registration Information/Key for W95/98, Registry Data File
.scf	Windows Explorer Command
.scr	Windows Screen Saver
.sct	Windows Script Component, Foxpro Screen (Microsoft)
.shb	Windows Shortcut into a Document
.shs	Shell Scrap Object File
.tmp	Temporary File/Folder
.url	Internet Location
.vb	VBScript File or Any VisualBasic Source
.vbe	VBScript Encoded Script File
.vbs	VBScript Script File, Visual Basic for Applications Script
.vsmacros	Visual Studio .NET Binary-based Macro Project (Microsoft)
.vss	Visio Stencil (Microsoft)
.vst	Visio Template (Microsoft)
.vsw	Visio Workspace File (Microsoft)
.ws	Windows Script File
.wsc	Windows Script Component
.wsf	Windows Script File
.wsh	Windows Script Host Settings File