Think you might do something similar in other software too. I really have to check once I get my PC back up and working 100%.
This technique can be used 100% for photoshop CS2 and up (I even tried CS5, works perfectly fine)
There was a similar technique somewhere around web, but I can't find it anymore.
Anyhow, enjoy, and give me a nudge in comments if it helped. Cheers.
No uploading elsewhere, just link it to here.
Art in tutorial is stil not uploaded comic panel.