Yes, definitely download the latest drivers.
DON'T install them straight away though!
The ones on the CD are never the latest - they'll work, but you might not get the best performance or stability out of them.
Though at the same time you might find them more stable than the latest.
Download the latest drivers, but don't install them.
Install the drivers on the CD first.
Then, just run it like that for a while - get a good half a dozen or so sessions of BF2 on that setup and see how stable it is - if it's running fine then you at least know that those drivers are stable.
Now, either way, whether it's stable or not, you might want to consider updating to the latest drivers - as I said they're likely to give you better performance, but their is a risk the system will be less stable.
If your system isn't stable then install the latest driver anyway - they may cure all your problems. Or they may make it worse - it's one of those 'you could gain a lot, but there is a risk you'll lose some' type situations.
Sorry, for being so 'sit-on-the-fence' but if you've been playing BF2 for a while you'll know that sometimes you get a 1.2, but sometimes you get a 1.3...
Also, I run ATI, so I don't know how stable the latest drivers are - I'm sure one of the nVidia peeps that hangs around could comment on that - and post a link to the latest drivers for you...