jimmy, I have an 05 elite v. I changed the oil and the impeller a couple weeks ago. The oil change easy. This is what I did:
buy an oil extractor, I bought one for $20 at basspro shop. it takes about 15 minutes to get the oil out. I got the oil filter from NAPA - search this website, you will be able to find the part number.
I plan on using the extractor on the vdrive fluid also. Just haven't got around to it.
The impellers on the merc v-drives are a little difficult to get to. It took me a couple hours because it was the first time replacing it. Now that I know what I am doing it will take about 45 minutes.
-Took the serpentine belt off
-loosened the fuel filter bracket
-Took the entire impeller pump off the engine (its much easier than trying to get the impeller out in the boat)
Once its off it may take a few minutes to maneuver the pump around the fuel filter bracket.
Take the pump to a work bench and undo the housing and replace the impeller. Make sure to put the impeller back in where the spines are bending the same direction as the were.
This is what I used as a guide to change the impeller. Its not exactly the same as my setup but close enough to help quite a bit.
http://www.tigeowners.com/impeller.shtml