I've decided to get myself a Powerbook and have newbie questions: 1. Will the Powerbook Wireless card be compatible with my Linksys G Router? 2. Will it be easy to setup the Mac laptop on my Windows home network? 3. File compatibility issues with Windows? Mainly Office and Adobe files. 4. Any benefits to buying the Apple Airport Router? If so, how would I integrate the router in my Windows home network? 5. Will it be easy to add more memory ? Thanks in advance!