the 3.299 is for upgrading 400 series units, it is not relevant when switching to an IP500 series.
to be honest if I was upgrading this far I would probably say sod it & reconfigure from scratch, there is probably half a ton of redundant programming anyway + V9.0 will have far nicer ways of configuring many features.
A Maintenance contract is essential, not a Luxury.
Do things on the cheap & it will cost you dear