Created a 720p WMV from JPG sequence of 3D animation in Premiere Pro. I cannot get it to playback smoothly

Problem: I don't fully understand the few parameters in the Premiere Pro Media Encoder. I'ts not an hard drive problem not being fast enough. I've tried it in different computers and the stutters are always in the same place.

Question: Is there a web site where everything in the Encoder is explained in full detail?

Been using Premiere since 1996 (version 1.0) always with 3D animations. I make a really high quality product, especially these 720 animations. But there are minor stutters that break the smooth playback of the videos. I've tried buffer size, two passes, etc. But I would like to know exactly what combination works.

Help?