I have to agree with the others, you can't setup the Nvidia card inside the virtual machine. Is there any particular reason you are trying this? I mean what kind of graphic thing are you trying to run in Solaris. I have always noticed the emulated VMware video driver is more the adequate for most purpose. I had seen a post as well which show a video of SUN Solaris 10 running on VMware Workstation where the graphics seems just fine. You might want to look at it Sun Solaris 10 running on VMware Workstation
I hope that help.