I'm trying to add/copy the smile from the left to the photo on the right and I'm struggling, adding cutting the smile out is not the problem, however creating the wrinkles is where I'm having the problems, I can't see an easy way to effectively achieve the wrinkles (as seen on the left) without spending the next week using the burn and dodge tool. Can anyone assist?

 It can be done. More to the point, it can be done better with good source and destination material. The straight-on smile just doesn't jive with the angle-on destination - plus you have to do more than paste the smile and wrinkles, you have to fix the nostrils to sell the smile - given the destination file is also highly compressed, it makes marrying the source a little more time consuming. Color-correction not withstanding. 

Quote -  It can be done. More to the point, it can be done better with good source and destination material. The straight-on smile just doesn't jive with the angle-on destination - plus you have to do more than paste the smile and wrinkles, you have to fix the nostrils to sell the smile - given the destination file is also highly compressed, it makes marrying the source a little more time consuming. Color-correction not withstanding. 

thanks for the reply, much appreciated.
What you did there looks very good. did you copy the pixles of the cheek wrinkles aswell as the mouth to get that result? Also what do you mean by "color-correction not withstanding"?

Regards,
EW

The wrinkles did come along for the ride. 

I color corrected the source-cut to better match the destination which made blending the two a lot easier. Without some kind of correction it would have made the blending of two that much more difficult. I also added a gradient layer effect on the cut to help sell the shade of the destination-face.

gotcha, I understand. will give it a go and post back. thanka again Twisted_Symmetry.

OK here's what I got, what do you think?

 Looks a little small'ish to me. Plus the smile is straight-on while the face is angled - you have to compensate for that by distorting/warping the smile.  

You tweaked the nose, ya? I think you pulled too much from the tip making the nose look like a fat nose rather than just pulling the nostrils - to give the impression that the cheeks are pulling on the nostrils.

Maybe others would have a different opinion, but that's how I did mine (which is still subjectively good/bad)

OK, I enlarged the smile and warped it more than I already had. thanks for the feedback :)

Becoming friends with the liquify tool couldn't hurt either, even if you aren't stuck using an old version that doesn't have warp. (It takes a bit of practice, but it's possible to change an entire facial expression with that one.) It looks like you got it close enough already though, so this advice is a bit late.

Quote - Becoming friends with the liquify tool couldn't hurt either, even if you aren't stuck using an old version that doesn't have warp. (It takes a bit of practice, but it's possible to change an entire facial expression with that one.) It looks like you got it close enough already though, so this advice is a bit late.

Thanks for the advice anyways and yeah I agree, though I've found if you push things too far with liquify in proportion, to where there is obvious stretching, then the clone stamp tool is then needed., thanks.