Yes, it's not all that hard, it just takes time. I can't seem to locate the purge procedure that Nissan put out for some reason (I have no idea where it went to, I thought it was on Nissanhelp but I can't find it).
So here's my rendition of it (this is what I have always done to every car I've owned, and it's worked well - I haven't had to do it to my Altima yet, but this is what I would do in absence of the purge procedure).
With the car cold, remove the rad cap and keep it off for the entire procedure. Fill the coolant recovery bottle up almost right to the top, leaving just a little bit of space for expansion (an inch from the top basically). Start the car, and turn on the heater to the floor, full heat, and full fan - leave it like this for the entire procedure. You might want to open your windows as it will get quite hot in there
Drive the car up onto ramps, and park on a hill if at all possible. Basically you want to get the front of the car as high as possible, and the back as low as possible to get the air to come out of the rad filler hole. A floor jack works fine as well. Whatever you have, use.
Have a helper get in the car, and keep the RPM's between 2000-2500. Make sure that the heat is still on FULL blast (highest temp, highest fan, floor setting). Keep it like this for at least 10-15 minutes. You should see the cooling fans come on eventually. Keep in mind that as pressure builds, coolant will spill out of the filler neck. Don't worry about this. Once you see the cooling fans come on, the rad will start dropping. Keep a bottle of pre-mix coolant with you and keep the rad topped up, once the cooling fans shut off, fill the rad as much as possible and put the rad cap back on (I highly recommend using a brand new cap). Keep the car running.
Now, with the new rad cap in place, and the over flow bottle over-filled with coolant, go for a nice drive out on the highway for a while (keep the heat on full blast!). That should do the trick for removing air from the system. Keep an eye on the coolant recovery bottle for the following week or two, and if it starts going down, keep it topped up. Once the level in the bottle stops changing, you can use a turkey baster or something of the like to remove some of the excess coolant in the bottle so that it doesn't spill out onto the road while you drive. I recommend keeping it slightly higher than the max line at all times to prevent air ingestion in future.
Good luck with that.