Is it possible to force the chipset?

[xorg at my.left-nut.org]

Is it possible to force the chipset, instead of auto detecting it? When I try 
to use the 'nv' driver, I get  "(EE) No devices detected.". It is a GeForce 
6200, and from what I understand the nv driver supports the 6200. If i change 
the 'nv' to 'vesa' I get video, and all, just not at the good resolutions, or 
accelerated rates.

This is the excert from my xorg.conf

        Identifier  "Card0"
        Driver      "nv"
        VendorName  "nVidia Corporation"
        BoardName   "Unknown Board"
        ChipSet     "GeForce 6200"
        BusID       "PCI:2:0:0"
        VideoRam    131072

This is what I get in my Xorg.0.log

(--) PCI:*(2:0:0) nVidia Corporation unknown chipset (0x0221) rev 161, Mem @ 
0xe8000000/24, 0xd0000000/28, 0xe9000000/24

Here is the lspci -vvvv  for my video card

02:00.0 VGA compatible controller: nVidia Corporation GeForce 6200 (rev a1) 
(prog-if 00 [VGA])
        Subsystem: XFX Pine Group Inc.: Unknown device 2144
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (1250ns min, 250ns max)
        Interrupt: pin A routed to IRQ 11
        Region 0: Memory at e8000000 (32-bit, non-prefetchable) [size=16M]
        Region 1: Memory at d0000000 (32-bit, prefetchable) [size=256M]
        Region 2: Memory at e9000000 (32-bit, non-prefetchable) [size=16M]
        Expansion ROM at ea000000 [disabled] [size=128K]
        Capabilities: [60] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [44] AGP version 3.0
                Status: RQ=256 Iso- ArqSz=0 Cal=3 SBA+ ITACoh- GART64- HTrans- 
64bit- FW+ AGP3+ Rate=x4,x8
                Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW- 
Rate=<none>