T61 won't switch to Increased Performance (graphics)

Just got my first T61, refurbished, love it but - I understand these have an integrated GPU plus a 'discrete' video card, and should switch between the two.
When I attempt to switch to the discrete GPU, I get the graphic in the middle of the screen that hangs for several minutes, before it finally 'gives up' and stays in low-performance mode (the on-board GPU). I have the low-perf -with-an-exclamation-point icon in the Taskbar at all times.
DxDiag shows only one GPU, the Intel on-board, shouldn't it show two? Same with Device Manager. Maybe my 'discrete' video card is missing/dead? Maybe I need updated drivers? (running the latest from Lenovo which are 2009-ish). Maybe it's a Windows 7 setting, or a BIOS setting?
Where's a good place to start troubleshooting this? Also how can I determine which discrete video card I'm supposed to have?
Running Windows 7 Home Premium 32-bit. My rig is a 7661-KK3.
ThinkPad T61 (7661-KK3)
Based on 7661-12U: T7300(2GHz), 2GB RAM, 80GB 5400rpm HD, 14.1in 1280x800 LCD, Intel X3100, CDRW/DVD, Intel 802.11abg wireless, Bluetooth, Modem, 1Gb Ethernet, ltraNav, Secure chip, Fingerprint reader, 6c Li-Ion, Windows 7 Home Premium 32-bit

Someone has installed graphic drivers for the wrong model thinkpad, probably a T400 or T500 on your system. I've encountered this exact same condition. You'll probably also find that you don't have a legit windows seven on your system either. On the system I was working on it came from an ebay seller that was using a windows seven restore disc for a newer model on some T61 systems, it seemed to install and work, but the graphic problem you describe was a dead give-a-way that something fishy was going on. I tried removing the graphcs drivers and installing the proper ones, but that didn't stop the prompt your getting to select graphic performance, and to make matters worse, that prompt would fail to respond because the hardware wasn't present and there was no way to close it either, you just had to wait it out until it eventually closed on it's own (timed out). I eventually reformatted the drive and installed the Vista that the machine was licensed to use according to the sticker on the bottom. 
If I were you I'd check your COA, since no T61 models shipped with windows seven, you'll probably find it's a vista sticker, or perhaps XP. There are some exceptions where major retailers put legit windows seven on refurb computers like this, but most are not. You can try to install the correct drivers and perhaps you'll have better luck then I did, as I was never able to get rid of that annoying popup that wouldn't go away or respond at all. 
If you do find your license is for vista, if it's business edition or higher you can install 64bit or 32bit versions. If you have over 3gb of ram you should consider going with 64bit. The same is true with your windows seven home premium, if you have a valid COA for that windows version you can install 64bit version instead.
Good Luck
ThinkPad W-510 i7-820QM(1.73-3.06GHz) Quad Core... ThinkPad T500, T9900, 8gb SSD...FrankNpad T-60p/61p (X9000 2.8ghz) 8gb SSD ips FlexView...ThinkPad T-61p (T9300 2.5ghz) 8gb ram...Thinkpad X-61 Tablet 4gb ram...ThinkPad A-31 (1.9ghz P4 1.5gb ram)

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