I am just about to buy an airport Extreme and 2 Airport Express, the express will be for airtunes and hopefully extending the range of wifi. Just a couple of quick questions if anyone can help. 1) Do I need to connect my own router (basic Netgear Router supplied by Sky) to the extreme? 2) Will using the 2 express in the house (4 storey town house) extend the range of the wifi? 3) Can I connect an Epson printer and my WD external hard drive at the same time to the network? Thanks for any help.