Try this for carpet:
http://www.cmldistribution.co.uk/pro...ace%202011.pdf
Only change might be front shock on middle hole on tower and silver springs on the rear. But give it a try first before you change any thing.
From the look of you set-up you are running far to light a spring. Brown springs are as soft as you get, they're only really used on dirt.
Let us know how you get on.
MiCk B. :-)