Is it very complicated to set up a home network to link two PCs?.

Danny has now got his "gaming" pc (spoilt child or what!) and some of the air conflict games allow challenges to other players online, so I was wondering if I was capable of linking our two PCs so I can try and thrash him.

I see Amazon have a kit advertised which apparently involves just plugging two boxes into two mains electric wall sockets plus the individual routers wherever you want them in the house, and apparently you can exchange files etc, but they don't make it clear if you can interact for such as games. I think they are Western Digital, anyone have any info on these please.

John