This is a Small Tutorial to show you how to make a Duotone Effect on a image by using Photoshop CS2 :

Open Photoshop. Open desired image. Image can be converted into two colors using Duotone.



Go To : Image >Mode > Gray Scale



Then select : Image > Mode > Duotone

Now You will get following box, Select "Duotone" from Type drop down menu, Select two inks, You need to name the first ink.



Now Following result is obtained after using above combination