This instruction assumes that you have downloaded the Call to Prayer installer archive from this web site. Make sure you have downloaded the correct version, either for Windows XP or Windows 2000.

Extract the setup files to your hard drive.

You will be installing the program from the file called setup.exe or just setup.

Double Click the file and respond appropriately to the questions. When you are done, click Finish.

Whenever you log on to your computer the Call to Prayer application will start in the lower right corner of the screen.

You can quit at any time by clicking the "X" in the upper right hand corner of the window.

When asked whether you want to replace the newer dll program with the older one in the installer, we found that the Do not replace selection caused problems in the installer. So, when we installed the Call To Prayer program, we replaced all the newer dlls with the older ones.
We do not know what the effect of placing Windows 2000 era dlls on a Vista machine will do.
The Call to Prayer worked fine for us when we did replace all the newer dlls with the older ones.