Multiple episodes on 1 dvd

can someone gave me some advice. have season 7 the simpsons their is 25 episodes. how do i put these all on 1 dvd without them being back to back i.e. once i,ve got them all onto dvd and say i want to watch episode3 how do i get them on the dvd separate without having to start from episode 1 and fast forward to 3. as this is what i have to do with my lost dvd bit of a pain the a**e.
hope i,ve made sense , i,m a newbie at this hadn,t even heard of nero recode before last week though i have being using nero express for years to burn dvd,s

thanks but the episodes are dvd files on hdd how do add these using nero recode not dvd shrink.

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