A little advice on updating please? ^o^

Hiya! ^o^

I have an iPhone 3gs jailbroken on 3.0 frmware with 04.26.08 baseband. I would like to update the firmware as there are apps which I would like whic aren't compatible with the firmware I have, but I don't want update my baseband as I am happy with the free tethering I am getting from O2... ^o^ I was contemplating updating with snowbreeze, but I'm just wondering if anybody else has done this and what your experiences have been with this method and any advice people may have!

Thanks for any responses! ^o^