Its pretty simple to cheese out a guard army.
Here's a list of a couple of things you can include in 2000 points.
1: 7 Deep striking demolition charges. This includes 2 cheap as chips special weapon support squads, and 5 last chancer sub units.
2: All officers (bar, maybe, one) are JO's, with 4 plasma guns, also deepstriking.
3: An infantry platoon, maybe heavy bolters/autocannons/missile launchers and plasmaguns, so that you can also take
4: A 50 man conscript squad, with an attached independant commissar. Give these guys flamers, or, especially if you are in a cityfight tournament where you have the ammo dump stratagem, give 'em 5 heavy bolters instead. Choice! (they have to kill 45 conscripts before they start hitting the heavy bolters, especially if the one officer you don't deepstrike has a standard bearer and Iron Discipline). Who cares if they have BS2, with the lasguns they are better than standard guardsmen (i'm serious), and with the heavy bolters its still a lot of dakka.
5: At least 2 basilisks with indirect fire. One in each corner, if you can safely manage it.
Oh, and
6: Dont forget to take min max plasma vet squads and deepstrike them too.
Then you can start the filler.
There's also this option:
1) Take a JO with a standard bearer. Give him a mortar. Take 2 mortar heavy weapon teams.
2) Take another JO, this time part of a heavy weapons platoon. Give him a mortar, and take 3 mortar support squads.
3) Repeat step 2 another 2 times. Tally so far: 37 mortars, 15 scoring units. And you are still under 1000 points.
4) Take a bunch of sentinels with lascannons/multilasers, deepstrike these things if you have to. You need
some anti-tank guns.
5) Take whatever troop choices you want. If you feel like it, do the conscript thing, its always fun no matter the army.

In fact, why dont you also take the 7 deepstriking demolition charges, if you can fit it in.

arty:
Only hindrance might be finishing in 2 hours, but I sure you can find a way around that problem...that and the fact that you will be really making your opponent angry with all those scatter shots, but hey.
Enjoy!
(I guess my point is, guard CAN be cheesy, should you think about it just a little!)