Where Virtual Device Driver Files are located?

I have a problem. In looking for virtual device drivers under the following regisrty path:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VXD

Here a key named STATICVXD has the name of the VXD file. So far I've found that these files are in the system folder. I want to know are there any possibilies of these files being present loactions other that system or system32.

Thanks in advance.

i would imagine that they could reside anywhere on the system, just like dll's, executables, or any other type of file on the system, however the common place to put them is in the system directory...