seriously? Send me $50 and I will send you detailed instructions.
This can be done easily without taking the dash apart. It can be done on a temporary basis or a hidden swith can be wired in. You WILL lose your ABS when you switch it off. After switching back on, You will need to turn the motor off and effectively reset the computer before the ABS will work again.
Of course! But you still have your tach and if you know what speed/gear your are in it is pretty easy to estimate. You lose other things as well, like cruise control, unless you have a manual trans. Nothing is free!
I don't know if either of these links will apply precisely to your vehicle/application, but I found them interesting and I thought that others here may also.