Hi Schutt!
I'm sure you know I'm undergoing the same process, just different Saitek stick. Don't know if I can help you, but:
Mode switch - As clevman said, you can use it to multiply commands bound to various buttons/axes/rotaries, basically it works like the pinky switch... this time you can have 6 different set of commands in the same profile (i.e. mode1, mode1+pinkie, mode2, mode2+pinkie, etc). But, to use it, you HAVE to create and configure a profile with the SST software you can download from Saitek site;
Rotary for head movement - You can do it with SST, basically you "cut" the rotary movement excursion in "bands", then you assign a key to each band; in these case, you have to create 3 bands, 1 for the left arrow, 1 for no key, such to have a neutral setting for the rotary, 1 for the right arrow. This way you keep the rotary in neutral state and move it left or right when you have to move head. You can even map for a diagonal movement, but things get a little more complicated and I think it won't be useful, as that type of movement can be useful on a plane and useless in another one.
Personally I bound the arrow keys to one of the hat, but I have one more than you, so it may be not pratical for you. Same thing for the rudder, I have a twisty on the stick and use that one, very handy, maybe for you it's better to set one of the rotary to work as an axis (you can do it with SST, not sure if you can do it with game configuration tool).
How's it going with the feel? I had the same stick you had before, and I'm having a hard time to get used to the new one, I can't get a decent set for axes scaling and deadbands: basically the afterburner spring was different, it seems to me it had a zone where it stiffened and that gave me a better feeling of how hard my virtual pilot was pulling on the stick. The X 52 has a limp spring, with costant hardness, and I lost that feeling...

and I still can't get used to the new one...
And I don't know if it's faulty: in control panel, on the pitch (Y) axis, when I "pull up", the cross don't move smoothly but with little jumps from one point to another: is it normal, or is the exemplar I have not working properly? Should I send it back???
Lol, I didn't think that changing stick could be so traumatic!!! I need psycological assistance!
