If you have a limited slip in the rear, powertrax makes a lunchbox locker called a "No-Slip" that will work with your current carrier. Its about 500 tho. I have this locker and its the best money I have ever spent, the results are amazing.
For the front just go with a lock-right or aussie locker.
The rear locker does fine in most snow conditions, but I can't vouch for the my front lockrite yet because I dont live were it snows so I cant tell you anything about how that handles. All i have done is chains front and rear briefly with both locked and WOW!
A locked front and rear with studs or chains will probably go ANYWHERE. At that point your basically driving a vehicle with tank like traction BUT, chains/studs are a pain in the ass so pick your poison...maybe two sets of tires??? lol