I spent some time working on that but the GF6 family is just too different internally from the earlier GeForce parts.
AROS NVidia driver is based on XFree86 nv driver sources. Here it works with a 6600 GT. With hw accelerated blits, rectfills, line drawing, color expansion. There's not a whole lot of difference between NV_ARCH_40 and earlier gfx cards. Mostly just in NVLoadStateExt() (which in AROS driver is basically just a copy&paste from XFree86 driver). The AROS driver is at the moment in sync with the XFree86 nv driver from some two years ago. Doing a diff shows that only few things changed since then which if you merge them in would give you support for gfx cards upto 7900.
