pseudocolor overlay in truecolor X session
 

Hi,

I have a Diamond FireGL1 graphic card, which uses a IBM 256-bit graphics rasterizer chipset, and only works for 24bit color depth (truecolor) according to ATI support website. My Linux is Red Hat 7.2 with XFree86 4.1.0, and I had to use a graphic card driver from www.firegl.com to get X work. Now I want to remotely run some application (on Sun Solaris machines), which requires pseudocolor visual. So my questions are:
1) How can I configure XFree86 to enable pseudocolor overlay in a truecolor X session? (sorry, I couldn't find the answer on XFree86.org)
2) Is FireGL1 supported for this purpose? (I tried to startx with 8bit color depth and it failed.)
Thank you.