Network Nerds! Help Needed:(

[Tom]

We have a router and a seperate wireless modem which complicates things because my mum is an ass... So basically everything is connected to the routers then to the interwebz.... But i bought that modem wireless router last night so hopefully with one router and properly set up network we're going to try and set it up a shared folder as said and see if we can stream movies with that Just need to make sure no one can get at my files cos well the family probably wont want to watch porn instead a film lol