Draw curves with path

Is there a technique to draw curves with path? I tried in photoshop and it looks fine but once it got optimized and imported to Flash, the output look sucks. It still look bearable viewed with the normal integrated graphic card but once you viewed it with dedicated graphic card, the edge is jagged. Is there a technique to smooth the edges and optimized it in Flash? I’ve tried Lossless/Png setting and it still produce jagged edges. Any input? Thanks!