sorry mate, i promise not to chat too much!!
Anyway back to the topic in hand, you've a few options really.
If your ammonia and nitrite are being consumed happily at this point then you have a few options you can take, this is in my order of preference
1 - get a friend/neighbour/relative to add ammonia every day for you
2 - get a holiday feeder (timed automatic one that drops food in every day not one of the blocks you just leave in your tank) and use this to drop a small amount of crushed flake food to the tank every day
3 - stock lightly with hardy fish and leave them with no food while you go away.
Do not add a large quantity of ammonia, if you go over 8ppm then this can kill off the bacteria so you'll do more harm than good.
If you can get someone else to just cycle the tank for you adding ammonia this is undoubtedly the best way, if not then adding flake food every day with an automatic timer will keep things ticking over although when you get back you'll need to do a water change and clean the tank out and do another qualifying week but it should keep most of the bacteria colony alive.
Stocking lightly is quite a realistic possibility, if you look at it completely theoretically it should be fine to leave them, however when you're dealing with living creatures it isn't always that clear cut, all sorts of things can happen to throw a spanner in the works and if you're not there for the first week or so it is leaving yourself open to a bit of potential trouble. But theoretically it should work!