how to play entire video at once in my ps3 from an external hard drive

Please help. I have no trouble making backup dvd's and playing them on my computer or DVD player with DVD SHrink and Nero. I want to be able to play the files straight from my hard drive to my ps3. When I access the files on my PS3 I can only play them chapter by chapter. Is there a way to play them all at once? Can I change the settings on DVD shrink to make just one big file? It doesn't seem like I can make a video playlist on my PS3 either. Thanks!