How do I Project To Screen in TSE

I am stuck and I need someones help. I use to be able to do the following code chunk in TGE in a GameObject::renderObject function and have a square block in the middle of my screen.

glMatrixMode(GL_PROJECTION);
  glPushMatrix();
  glMatrixMode(GL_MODELVIEW);
  glPushMatrix();
  
  dglDraw2DRectangle( screenCenter, 100,  0);
  
  glMatrixMode(GL_MODELVIEW);
  glPopMatrix();
  glMatrixMode(GL_PROJECTION);
  glPopMatrix();

Now I am trying to do the same thing in TSE, but I am having no luck

GFX->setCullMode( GFXCullNone );
  GFX->drawBitmap( textureHandle, screenCenter);

This draws the texture but from the persepect of location 0,0,0 (In 3D) not in the middile of my screen.

I think I need to do the projection and modelview as I did in TGE, but this is where I am at a loss. How do I do this in TSE?

Thanks