If it is the same as GSR, then you can try these :
1) Remove the nuts from the drivers side first
2) Remove the glove compartment (on the co-drivers side)
3) There should be some screws in the middle (try looking from bottom up, as they are well hidden)
4) Remove the cables hidden behind. There should be some on the drivers side and co-drivers side (speaker wire especially).
5) There should be bolts holding the dashboard to the body. For Wira / GSR, they are on the air-con vents on top of the dashboard (the 2 small round holes right next to the doors). You need to remove the vents to see the nuts inside. Becareful not to break the fins of the air-con vents.
ps : It would be easier to remove the steering wheel first, or you might scratch the glass and tint (if any)