1. Open Photoshop 7.0. Open desired image.
2. Open another image which you want to mix with previous.
3. Drag the second image on the first using Move Tool.
4. Go to Layer Palette
5. Select top image layer. Change the blending mode to Multiply.
6. Using Move Tool, drag the top image to proper place if require.
7. Select Eraser Tool, use soft brush and erase unwanted area of the top image.
8. Go to Layer Palette. Select to image layer. Change the opacity to 70%.