honestly, i don't seem to feel this 'extra' vibration.

maybe the fact that my car is stripped of it's interior leaving just the dashboard and aircon.

car manufacturers are always concerned with NVH (Noise, Vibration, Harshness). so designers come up with all sorts of bushings to reduce NVH. it is due to the fact that an average person can only withstand so much NVH until they suffer from stress, fatigue and in extreme cases, pass out.

which is why cars tend to have a softer (less harsh) suspension for added comfort (thus reduced NVH)

dremax,
it's a simple procedure requiring almost no advanced technical knowledge. assuming you wanna change all 4 engine mounts, you need to know how to remove 3 bolts from each mounting (based on wira/satria/putra, most cars should be the same) and going to the parts store to buy 4 new engine mounts. that's it.

other factors that could cause poor idling are a blocked/clogged PCV valve (Positive Crankcase Ventilation valve). cheap to replace, only RM28 for the hose and the valve, get it from local part stores cause ori proton ones cost RM70+ for the valve alone!