You basically need another kettle to heat up your mash water, size dependent upon size of your batches and a beverage cooler/regular cooler to use as a mash tun, either 5 gallon or 10 gallon. A 10 gallon will get you beers in excess of 1.060 at around 20-25lbs of grain for a 5 gallon batch. A 5gallon will max out at about 11lbs grain and up to 1.060 beers for 5 gallon batches. Midwest supplies, Austin hombrew and other sites have what they call All Grain conversion kits that basically add what you need to make the switch. Congratulations on making the move!