Have you got the spare seals etc. yet? Ideally you need the motion control service kit (R5250000) and the air service kit (R5251000). If you want to do a full service you'll need these as well as suspension oil (from memory you need two different wt oils, one for lubing and the other for the damper circuit).
Full service guide can be found here
Suspension oil can be got from your LBS, Chain Reaction Cycles (they seem to carry a decent range of wts) or a motorcycle spares shop. The service kits can be more difficult to get hold of, either try your LBS (I get mine through Ride On in Rawtenstall) or online through TFTuned.
I've not fully serviced mine yet although I have had them apart and cleaned them up. Was going to fully service mine over the winter. If you really need help you could always pop up to me (I'm just north of Bacup) but I can't promise total success. I'm not an expert so can't guarantee that they'll go back together perfectly :lol:.