From This:
to this:
Made in Photoshop CS2
No curves, just color layers
1 Layer Duplicate the base, and set it to screen, opacity 50%
2 Layer New Layer 002655, Exclusion 100%.
3 Layer New Layer ffbad4, Soft Light 100%.
4 Layer New Layer baebff, Color Burn 100%.
5 Layer New Layer baebff, Color Burn 100%
6 Layer New Layer baebff, Color Burn 100%
7 Layer Duplicate the base, and set it to soft light, opacity 100%. Drag it to the top.
And your done!
other icons done on the basis of this tutorial