Hello. I bought an iMac two years ago; it came with Mac OS X 10.3, Panther. I then bought a 12" iBook in July of '05. It came with Mac OS X 10.4, Tiger. My question, then: Is it possible to use my Tiger install disc in my iMac, thus updating from Panther to Tiger, or will it totally screw things up? Is the install disc somehow tailored only for use with an iBook? Thanks.