Help With PS3

Hello, i ussaly watch tvshows or moives before i go to sleep. Thourgh PS3 Media sever but i have to keep my computer on. Is there a way to watch dowloaded movies on my PS3 without media stream, Or a Blue-Ray player.
Answer #1
with large hdd you can watch the downloaded movies .
Answer #2
or you can create a timer on your pc to shut down i do this
http://www.mediafire.com/?p9t1ndy7y1s5bzc
if you right click this after its downloaded and click on properties you will see the number 5400. this is how many seconds, 5400 seconds = 1 hour 30 mins
change it to your desire
3600 = 1 hour