Compaq Presario Windows 7 upgrade, can't use nVidia card drivers

I'm not sure if this belongs in Drivers or here, but I'm having an issue with the video drivers on my laptop. It's an HP Compaq Presario V6000 series,v6205 according to the limited tech support I received.
The laptop was purchased in '06 and originally ran Windows Vista, however I upgraded to Windows 7 Ultimate 32bit a couple of days ago, and have had an issue finding compatible drivers, namely a driver for my nVidia graphics card. HP's website has the drivers for XP and Vista, but want to charge me to get 7 compatible drivers (59.99 for a one-time use). I've read on other forums that it is possible to take the non-manufacturer drivers and modify the .INF files to work, but I'm inexperienced with that sort of stuff. Can anyone offer some advice or walk me through this? The card is an nVidia GeForce 6150. If there are any other details I've left out, I'd be happy to add them. Thanks in advance.
EDIT: In the event that I can't secure the proper drivers, does anyone know if Linux is an option for such a machine? Or would the same driver issues be present?

Try these drivers,

NVIDIA DRIVERS 285.62 WHQL

I'll try those, I'm downloading now. Just want to mention though, I tried going to nVidia's site and I got the same issue I got from trying to install HP's Vista drivers. It told me I wasn't running Windows, and that it's only compatible with Windows. But since I've got nothing to lose I'll give it another shot. Updates to come shortly.
EDIT: I tried installing the drivers by running the .exe and it says that it's not a compatible card. I went to Control Panel and tried manually locating and applying the drivers and it tells me that the drivers are up to date.

Notebook drivers can be problematic. Manufacturers sometimes use custom device IDs, so that an installer that comes directly from nVidia may not recognize the video device.

You may get the best available drivers through Windows Update. If that doesn't work, try installing the Vista drivers from HP. I dimly recall doing that to get my CQ50-105NR (nVidia 8200M) going, back when Win7 was new. (HP has since posted Windows 7 drivers.) Once the Vista drivers were in place, Windows Update recognized the hardware and installed proper Win7 drivers.

I don't know what's out there for Linux. The latest nVidia Linux drivers don't appear to support the 6150 Go, but perhaps some Linux distros include it.

Good luck.