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Here's what I did in PS CS3:
1. - Open image in PS, making sure it's already a simple image file (JPEG, PNG) and not a PS file, also should be 320x480 or less for ease of use, but you can always resize after opening I guess.
2. - On the dock, go to the layers tab, it should say you have one layer (named background), double click that and accept the default name of the layer.
3. - Under the layer viewer, there's a button for "add layer mask" (looks like a camera sort of, hold your cursor over it to make sure).
4. - APPLE+A...then APPLE+C (or SELECT>ALL...then EDIT>COPY if you prefer)
5. - Now, Hopefully you have a tab for "channels" right next to the "layers" tab, if not, turn it on in the "window bar up top. Click it.
6. - now you should see 2 channels total for a grayscale image (which you can make by going to IMAGE>MODE>GRAYSCALE if you like), and 5 channels totals for a RGB image... if a color RGB image you'll have one channel each for red, green, and blue, and one labeled RGB, all little eye symbols to their left, and one that says "layer 0 mask" with an empty check box instead of an eye....check the box next to the "layer 0 mask" to give it the eye, and uncheck all the other boxes (only one other box if a grayscale image)...your picture will disappear but it's ok, we want that.
7. - APPLE+V...APPLE+I, or the mouse equivalent of paste and invert, it'll still look weird, but don't worry, almost done.
8. - Go back to layers and check all the RGBs again with the eye, and uncheck "layer 0 mask"...at this point the image should be close to what you started with, but the color may be off a bit, usually pink-ish looking, that's what we want.
9. - Go to FILE>SAVE FOR WEB AND DEVICES
In the presets select PNG-24, check "transparency" if it isn't checked, and leave the interlace box unchecked.
10. - Save your file where you want and use it.
You can then exit PS, and no need to save changes as it'll save in a PS format.
Hope this helped some of you guys.
Feel free to PM me if you have problems, or questions... I'm a PS n00bz0r, but I will try to help if I can.
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