put the layer with the image above the text.
then hold alt between the layers and a small arrow should appear. and after you alt+click between the layers the image should only appear inside the text. and if you want the image to be in only 1 letter you just use a clipping mask on the image.
but maybe your font is different and wont work because of the premade shadow.
hope it helps
if you got any more questions you can pm me
it should look something like this:
result:
This post was edited by prom0e on Sep 28 2015 03:42am