First off i need to give a shout out to the parallels team for making such a great product!! Now onto business. When running autocad 2006 under parallels, i am noticing some very strange behaviour. Autocad hangs for 30-60 seconds while loading a file through a Mapped \\.PSF folder. For example, i have \\.PSF\Home mapped to H:. Once the file is loaded there is absolutely no problem. The problem does not happen when I open the file using its UNC path, or by browsing to it.. for example \\.PSF\Home\Desktop\SomeFile.dwg. The problem does not occur when the file is local to the VM. What i have done to work around the problem is map the drive using my mac's home directory share instead of the paralles shared folder. \\NickMac\nick -> H: I feel this is a sub-par solution as i do not want to leave my home directory share open. One other thing i notice, is there is a bit of network activitiy when im accessing the file over the mapped PSF folder. Using my handy dandy packet sniffer, it shows that my machine make many DNS lookups for my machine's name @ my ISP's domain. This does not happen when i use any of the other methods described above.. Has anyone experienced something like this, possibly with another app? I am running Windows XP SP2 under Parallels build 3120.. Network is DCHP for both host and client. Any insight would be greatly appreciated.. -N ps. Other than this one problem, AutoCAD 2006 runs amazingly well on my MacBook Pro C2D under Parallels... I have configured it to run using OpenGL for 3d, and i have to say its quite stable and useable (although not 100% perfect).