what times is you promash recipe guide telling you to add the hops?
**EDIT**
either way if you're using a 2 galon pot your kinda going to have a ruff go at it . . .
if it was me I would steep the grains at 150ish for like 30 minutes in about 1 gallon of water, use that same water to rinse them . . .
add the LME and then "top off" you pot to about 3/4ths full and boil adding the hops at the times specified . . . you going to end up low on the bitterness scale because your boil is going to be thich but with a 2 gallon pot I think you're kinda hosed . . . if ya can afford it go buy a turkey fryer (even if it's just for the kettle at this point) it's a $30 investment that you wont regret . . . cool your wort complete DO NOT PUT IT INTO A GLASS FERMENTOR HOT and top off to the 5 galln mark with water . . . when the temps right add your yeast
oh yeah watch your pot carefully for boil overs, it it looks like it might boil over lift it off the burner until it calms down, also your going to want to stir that thing alot because your boil is so thick your risk of scoarching is going to be higher then normal