I have an iMac (the version before any black was introduced) running OS X 10.4 (if 10.5 would help, upgrading would be an option) and I would like to connect it to two different networks - one for internet and one for file sharing and printing. Both have a modem connected, but I want to only want to use one for internet. The wireless one is the one I want to use just for file sharing and printing, the wired one is the one I want to use for internet access. Is this possible? If so, how? Thanks!