--- off topic ---
Hey, I'm assuming your new. The forums tend to be pretty dead earlier in the day. In the future please try not to double/triple post or use excessive amounts of smileys/CAPS/other characters. Instead of creating new posts, you can hit the edit button above your original post and add what you would like to say extra at the bottom. For excessive smileys/CAPS/other characters, just don't do it to that far of an extent. The smiles are colorful/popping, and bug peoples eyes when there are several together. The excessive CAPS and other characters simply make it difficult for people to read what you are trying to say. None of those things honestly bother me (I am a difficult person to bug/annoy), but it does for a fact annoy several individuals on the forums. Just thought I would let you know.
--- on topic ---
I'll try to help you the best I can. I've been hand-building for a few years, so it's pretty easy for me to do this quickly. It may take you a while though to get it right. Pumping is most commonly found in turns or in a helix, but may also be found within inversions and even hills. It is when there is a curve of some kind and it is not perfectly circular. By circular, I mean what ever the direction of travel is it is not consistent, but rather it kind of pumps/jerks. This can make for a rough ride, weird g-forces, etc.. To fix this, you just have to take your time and get your angles right. That is all. Essentially, when a ride is pump-free it will generally be smoother all around and more realistic. I just made an example image for you, I hope it makes what I said a bit more clear.
[img.nr]http://i547.photobucket.com/albums/hh447/A7X-Shane/Other/PumpVSFree.png[/img.nr]