i specifically dont want wireless. the router will have wireless for laptops etc but i want my connection hardwired. i personally dont like wireless for its lossy and intermitent connection.
Do you actually have the wireless router already, or have experience of one in your property? I think the point that Alex is making is that if all you intend to do is share your broadband connection between your machines, then for most folk wireless is the best choice, and you
may see no real benefit over a wired connection. The latest MIMO and wireless-N routers provide good coverage, and the real-world speeds they support will out-strip the maximum your broadband can supply anyway. The real advantage of a wired network comes when you do actually want inter-computer/NAS/server connections at the maximum speed and/or the layout/construction of your home means that wireless isn't a good option. This might be the case but, if not, I'd personally go the wireless route. I guess I'm also assuming you're talking about network connections for PCs, rather than consoles/XBoxes and the like, of which I don't know much.
If you do go down the wired route, it's all quite simple. Just make sure you get some reasonable quality Cat5
e solid cable. There's no point in looking at the extra hassle and expense of Cat6 cable - if the router you buy/have has a Gigabit switch, then you'll get Gigabit speeds over Cat5e anyway, if you connect everything up neatly (and this will be a moot point if all you're doing is sharing an internet connection, as above, anyway). It's worth investing in a cheap Krone-type punch-down tool for making the wired connections to the key-stones on the face-plates you buy e.g.:
http://shorterlink.co.uk/13211
In a nut-shell, you just need a hard-wired connection from each port of the router's switch that you want to use (there are typically 4) to wherever you want the additional connection replicated, so I suppose the neatest solution is faceplates for the number of ports you want to use at the router's location, wired to faceplates at the destinations. If this is alot of hassle, you can actually take a single connection from one of the router's port, e.g. from downstairs to upstairs, and then "split" this using a switch (~£20) at the destination to give you multiple connections from a single ethernet run.