Using software rendering with OpenGL accelerated hardware.

My 3D hardware seam to cause some problems in a modeling software for Windows NT4. I would want to try using software only rendering but don’t know how. The OpenGL32.dll is still the same than before so I can’t just put the old one. I think that on Windows platform the 3D accelerators drivers are some kind of addons to the microsoft lib but I don’t know exactly how those it’s work. I need to know what files or maybe registry entrie I have to erease.

Note: I had some sucess by obtaining the old SGI libs for windows and renaming them from OpenGL.dll to OpenGL32.dll but even if my software run I get more bugs and rendering problems than before.