I own the W710i there are no modified or better cam drivers for it, it's just the cam drivers already on the firmwire. You can try updating the phone using Seus that will make it a bit better.

I've never heard about w200i modified and then better than the w710i. All cam drivers do is just make the quality a bit beter, it will not add features like zoom, auto focus etc because there hardware based. Cam drivers are software based.