This is what i did with my frickin laser beem!
If the speedo cluster is the same as the GT then you can remove it really easily.
Undo 4 screws,you can then get to 2 clips which holds the glass front on.
Once glass front is removed you can then pull the cluster out past the steering wheel.
The back of the cluster is held on by several clips,once unclipped you can then get to the cluster dials.
You can then carefully place a small piece of grease proof paper or thin piece of paper into the hole where the led sits under the dial front,whenthe light shines through it comes through much dimmer.
Its maybe not be an ideal solution, as to fitting a resistor, but it does do the trick quite nicely!
Last edited by garybazza; 09-10-12 at 18:35.