According to Viva-Media, Lost Chronicles of Zerzura requires 256 MB of video memory.http://www.viva-media.com/lostchroniclesofzerzura.html
"TurboCache" means your 6200 uses "shared" system memory, which is a lot slower than video memory.
If this is a laptop, that's why the drivers won't install. You'd need to get newer drivers from http://laptopvideo2go.com/
which is a site devoted to adapting desktop video drivers to install on laptops. If this is a desktop computer, it may be that the latest drivers are incompatible with your video card, which is quite old now. (The Geforce 6 series is about 9 years old).
However new drivers are unlikely to help your problem, which is that your 6200 doesn't have its own discrete video memory. Fromhttp://en.wikipedia.org/wiki/Turbocache
When TurboCache was introduced on the GeForce 6200 with TurboCache, there was confusion over how much local memory a buyer could expect from the TurboCache enabled video card. This figure could lie between 16-128MiB
So even if you have a card with the larger amount of discrete video memory (128MB), it's only half what the game requires according to Viva Media. So the game will play, but it will use system memory and response will be slow.