I did the same thing a couple of weeks ago
1. take a picture, or if you have a good memory look where all the linkages go
2. door handle, card ect. take them off
3. undo the mirror and connections, and take off
4. undo the torx bolts i think there are two of them, one near the top hinge, and i think the other one is above the latch right at the top
5. get the window in the right position
6. undo the bolts holding the window frame in the bottom of the door
7. slide the whole frame up enough so you can gain access to the latch, and remove the latch
be careful when sliding the frame up, this doesn't need to be removed completely, you can gain access to the latch with it half to three quarters up.
i needen't have done my spring, i just adjusted the position of the latch and it seemed to work ok then, but changed the spring anyway.
oh don't forget to be careful with the central locking solonoid, it's best the mark where this was to save problems later.
the spring isn't to bad to fit, just make sure you remember how it fits in the mechanism, i wished i have never started it when all the linkages were out, but got there in the end....best of luck
hope this helps