Movida, that file is a vxd driver file - last time I checked NT OS platforms (like WinXP and Win2k) do not support VXD drivers. I believe there are other drivers which the Interlok system use for WindowsNT OS platforms. Ther tpkd.sys file should be the NT version - I presume Curious Labs is making sure the older version works first before releasing it. ------- I'm not sure I kinda understand some things - maybe Curious Labs can answer these... 1) Does Avatar have a new version of Interlok drivers installed then Poser 5? 2) Could updating the Interlok drivers from Pace's homepage help with the problems (since they have a update for their Interlok system) 3) Is the "Dongle" Curious Labs was/is thinking about the Ilok system? Is it tried and tested, how much would it cost users? Etc etc... Thanks