Have ICC printer profiles for lab, how to attach to file in Elements?

I'd like to use a pro lab to print some photos and I have downloaded and installed their printer profiles. I can't, however, seem to figure out a way to attach the profile to my images. I'm working in Elements, so maybe it can't be done??

The lab couldn't help me as they "know nothing about Elements." 

Failing that, what is the best way to prep my image file for printing to a lab? I have set the colour profile for the images to AdobeRGB and selected Optimise for Printing, but not sure if that's the correct way to approach this.

Any help appreciated!

Thanks.