ah, I guess you'll have to look at the new part to see where the screw holes are then find them on your car. I wanted that kind of arm rest but i ended up with the type which bolts under the seat runners
i hate it when somthing which you expect to be simple turns out to be really difficult!
Its quite simple ... theres the dash uprights that have to be loosened (torx), the screws in the cup holders in the front, the screws under the side mirror adjuster switch (all phillips if I remember correct), and the one in the rear cup holder (I think philips again?) and thats just about it I think. its then just a mattwer of taking the covers off handbrakes and gearleaver etc
Can be done in about 30 mins and takes only some basic tools