Yes it will work.... the jury is out on if it will float better though as the 2009's have decreased bellypan area.
The hood is the same.. the front grille/hinge assy changed is all. If you destroyed the stock hood as well.. any of the 2005 - 2009 IQ RMK hoods will fit
You may be able to find someonene that is upgrading to the 2009 plastic and has a perfect set of 2008 stuff to sell as well.... then you can use TreeDogs bumper or the SPG and a float plate for extra frontal protection if you are on a budget.
You will need to use the STOCK airbox assembly, a timbersled or FNI (out till May).
I'm not a fan of the Timbersled as it draws hot air from under the hood.
The FTX bumper will take the most punishment of them all and protect your front end better than the factory "grab handle-loop" on the 2009's.
Skinz Protective gear makes an excellent bumper as well.
The other things to think about is the swaybar... the 2009 works better than the one you have and the mount for this is integrated into the top bumper mount anyway.
If you destroyed your A-arms, get the 2009 models made for the new swaybar...
Contact Z-broz, Tri City Polaris, Carls Cycles etc to see if they have any front suspension take offs from upgrading to aftermarket setups. The spindles absolutely stink on the 2005's and you should upgrade to the 2008 and up (heck the 2006/07 spindles are an upgrade).
Be carfull taking out your ball joints on the lower A arms and you should be able to re-use them.
Other things to check for on a frontal collision... broken motor mounts, torn throttle body boots, ruined exhaust pipes and cracked welds on mufflers. Upgrade all the motor mount bolts to grade 8 at this time (especially the ones that go into the front motor mount plate thru the bulkhead sides.
Your current sidepanels will switch over to the new stuff.
Good luck!