We are looking at going to 64-bit XP Pro for our Engineering workstations, we are also in the process of updating to AutoCAD 2008 and Windchill 8.0 M50. Right now the WGM is not supported and does not even run out of the box with 64-bit AutoCAD 2008. We talked with PTC to try and get a temp patch to work around this. The odds of this happening are not very good as they are focusing all 64-bit compatibility for 9.0. One of the techs I talked to did say that a few companies have gotten the WGM to work with 64-bit. I am wondering if anyone has actually gotten it to work and what they did to get it to work.