The World is Not Enough Walkthrough:
3: A Cold Reception
The third mission is about the parahawks in the snow. You'd hope it'd be a fun skiing mission, but you're always stuck in little chutes so you can just go forward or down.
Shoot the guys in the starting area, then head forward to the right to enter the first chute. You'll go down towards a guy, and then hit an open tube. The trail continues to the left - head down the slope. You'll meet the woman again, and will be swarmed by enemies. Tag them one by one.
The World is Not Enough Walkthrough