How do I install the .inf file after I download it?

You'll need to install the file using the Add New Hardware wizard.

1. From the Start menu, choose Settings->Control Panel.
2. Doubleclick Add New Hardware.
3. Click Next.
4. You'll be asked if you want Windows to search for your new hardware. We want to specify the new modem information, so select No and click Next.
5. Next, you'll need to select the type of hardware to install. Clearly, you want to select Modem. Then click Next.
6. Windows will offer to try to detect a new modem. This often works, and is worth a shot if you don't have a .inf file. Since you do have a .inf file, you want to select " Don't detect my modem; I will select it from a list." Then click Next.
7. Click the Have Disk button.
8. Click Browse and navigate to the folder where the .inf file is located. If you're in the right directory, the .inf file should be listed on the left side of the window. Click OK.
9. Click OK in the Install from Disk window.
10. Select your modem from the list and click OK.
11. Select the COM port your modem is on and click OK.
12. Click Finish when Windows is done setting up the modem.

Next question: How do I tell my programs to use the new modem settings?