I am looking for the best way to add some grain to color digital images, to take off some of the digital curse when making larger prints. I don't need to simulate any particular film look, just want to add convincing color film grain. I have used DXO Filmpack in the past, but the version I have no longer works on my current computer. Buying the current version seems like a bit of overkill just for grain. Is there any other software or technique in photoshop that might work for color?