Setting up another computer as a extender

Could some help this f=== dumb ass out Sorry a bout my English and spelling. I have 2 computers. One I was using as windows media center. I have it set with a Ceton Infinity tuner card. This one has Windows 7 pro 64 bit. The other one was just setting doing mostly nothing. It has windows Vista ultimate 64 bit. I thought that could make this one as a extender but I am having trouble setting it up. I believe that I have both computer setup to share all files.
I can go to no 2 and add libraries that on no 1 but nothing shows up on no 2.
I am about ready to throw a computer and the other equipment I bought for in the trash. Just about any thing I do screws up. Every can that I guess Can not spell or write in good English.

You can't use a PC as an extender.

You can use windows built in file sharing for your media, search on howtogeek.com - they have a good article on this. If you're wanting to share your tv card you can do so with a network share using DVBLink