QTR-Quadtone RIP

Hi,

I've been doing BO for quite some time and I'm ready for a new 
challenge.

I just dowloaded QTR and I am eager to try it. But, I have two 
questions before I start:

1) When saving the file as grey scale, do I need to imbed a profile? 
Without imbedding a profile, how would QTR know/understand/interpret 
the tones in my image? 

2) I downloaded the Carl Schoefield's soft
proof file for the 2200 and QTR?  I am running a PC
and the files that I received were *.sit files, not *.exe files.

On the QTR website, the directions say: 

"See Carl Schofield's website for Soft Proofs of 2200 profiles. To 
use the soft proofs, simply install them by double-clicking 
InstallProofs. You have to restart Photoshop and then under 
View>Proof Setup you will see all the proofs."

Are these files for the Mac only?

I would like to soft proof the image in PS before I print in QTR. I 
am running a PC with PS CS and Windows XP.  Can someone point me in 
the right direction?

Thanks in advance for your help.

David