QTR-Quadtone RIP

I'm using QuadTone on a Mac. For various reasons I have Photoshop on
a Win2K PC 
instead of the Mac. I prepare the images on the PC, save as TIFF,
grayscale, gray gamma 
2.2. I then use Photoshop Elements on the Mac to open and print the
image.

I'm confused by the existence of the Gray Matte and Gloss ICC
profiles. I've read that 
QuadTone ignores embedded profiles, but also that one may convert
one's image to these 
profiles.

I'd appreciate any guidance on whether these profiles, and the Gray
Lab space, are 
applicable to my current workflow and on understanding their function.

many thanks

andrew