What you are refering to is the swap file or paging file as it is known in NT based systems. I am running XP and will give you a quick run down on how to change it. NOTE: This assumes you have two drives or one drive with multiple partitions. 1. Right click on my computer and choose the properties option. 2. Click on the Advanced Tab and under the performance field click the settings button. 3. This should open up a window with two tabs, once again select he advanced tab. 4. The bottom field should be labeled Virtual Memory, click on the button in that field to change the settings. 5. The standard setting for a paging file is 1.5 x the amount of RAM in your system. Now for things like poser or other graphic intensive programs it pays to set it higher, but still keep it within a normal range. 6. If you installed Poser on your C: drive then set the paging file to be on one of your other drives or partitions. Click on the drive letter you wish to put the paging file on then set the limits of it in the boxes below. The reason for this is that if you have two seperate drives, the second drive is usually unused for the most part since it is primarily storage. You can set the paging file to any number you want so long as it is less than your free drive space but somewhere between 500 -1500 megs should be plenty. I personally have mine set at 1250 but that is just my own system. For the most part you wont notice much difference in the way it performs (or at least I have not in testing the paging file being on either drive). So if you only have one drive or partition dont worry about it.