2.53 Exporting to DirectX (.x)

Hi,

some of my friends and me are going to our own first game. Well one of my friends is using 3ds max and I’m using blender. So we decided to use the .x format for our games. I activated the Exporter in User Preferences / Addons and tried to export a simple map. The .blend file has a size about 18MB… the .x file is about 90MB. I’m not able to find compression or bitwise export. Can you help me?