Whilst this link paints a rosy picture of novated leasing (SMB is my employers chosen lease company). They do have a lot of useful information on FBT, GST, residuals, calculators to see if its worthwhile etc etc
http://www.smb.com.au/NovatedLeaseVehicles/default.aspx
Not sure how you are getting your vehicle but my lease company's fleet price was pretty good on my X-Trail.
Not sure on CHP, but on a novated lease you can (or could) get non factory mods fitted into the lease cost. eg my TJ had 3" Teraflex lift, wheels, 33's, winch, steps, lights, sunrider softtop, high lift etc all added through USA4x4 before I got the keys. There is a % limit - forget what it is.
I did go through my first lease with a tax accountant - that is probably the only useful thing I can suggest