If you are going to swap the complete cluster, then you will need to get the new cluster re-programmed.
(You will need to set the Odo, VIN, engine, trans, body style, ABS/ESC/TRAC, suspension type, and a carp load of other settings to get it to work on your car)...
However, if your cluster, and the cluster you are thinking of getting is the same manufacturer type (More on this later), then the mask, and the plastic bits will be interchangeable.
Buuuuut, if your cluster lights up green, then you will also need to change out the LEDs.
If you wanted to go down the swapping out the cluster, get a good triple LCD cluster such as a Berlina, Calais, or HSV cluster.
The Triple LCD models are soooo much nicer compared to the single LCD models. (Which makes the cost of reprogramming the cluster worthwhile).
If you are on a budget, just try changing the LEDs out to get the illumination colour that you want, and hunt down a cheapy SV6/SS/SSV cluster to swap the bits over later on).
If you are happy to spend money, then don't waste your money on a $150 single LCD cluster. The programming for it will cost you more than the cluster, and you are really not going to see much benefit for the amount of $$$$ you will spend
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Now when I say the cluster manufacturer type above, there were two manufacturers that made VE clusters.
VE Instrument clusters from Year Models MY06, MY07, MY08 and MY08.5 have a white plastic cover on the back on the instrument cluster.
These instrument clusters are manufactured by Arrow Australia.
VE Instrument Clusters from MY09, MY10, and Series II Commodores have a black plastic cover on the back of the instrument cluster.
These instrument clusters are manufactured by Continental (VDO).
The cluster bits (boards, housings, trim bits, clear lens) are not interchangeable between models (However the cluster dial mask can be fitted to one and another, with a little bit of modification).
I hope this helps.