Configure IIS to allow downloading .dat files

Note: This is for IIS 6.0.

1. Open IIS Manager.
2. Browse to the IIS Site or subfolder where the .DAT files are
3. Right-click on that site or subfolder and select Properties
4. Select the HTTP Headers tab
5. Click on the MIME Types button
6. In the extension box, type ".dat”
7. In the MIME Type box, type "application/octet-stream"
8. Click OK