Yes, Choosing a reliable travel agent is very important for spend two day. I found a website  www.localvibeguide.com/ where you get PAID for writing local guide. You can also get local travel information for visitors of most of the places. One must avoid the tourist traps and discover what the locals do.

Kulamlampur is a great place. there r lots of place for shopping and stuffs.i am sure you'll have a lot of fun there. 

Many many places to eat. KL City Centre is by far the best place to get food. Step into Suria KLCC, a favorite shopping complex for locals and tourists. There's a lot of foreign and Malaysian foods to sample. Vivid Dance club is the most known and fun is always had by all. They have a Hard Rock Cafe too that play a lot of rock and R&B. 

You'll have to squeeze a lot in the two days you are there, but make sure you visit these spots during your stay.

Just be aware of the taxi touts. Make sure they have meters and if they do have one ask them to flag it down or else you'll be paying for more than what you should.

One tip also is to hold on to your valuables / belongings always. My friend's car was just outside the resto while he eats and when he came back his laptop was gone in an instant.

Of course not to miss is the Petronas Twin Towers. You can view the city when you go up the tower but be sure to go there early morning for it can fill up tourists fast and i think they only allow certain number of tourists in one day. Take a picture of it at night when all the lights are on absolutely beautiful !

But of course KL is just one place to visit in Malaysia . It has more to offer.