Hi, can you use reinstall disks for home xp for computer that didn't come with it?

i've got a dell E310 desktop with windows home, didn't come with disks. ebay has for auction reinstall disks for home that includes things like sound blaster, but i don't think my desktop has it, can you use the reinstall disk to install it to begin with or must it already be there? please help, this is my first computer, thanks