The Merger

Because there are several different sources of roms, sometimes you download individual rom files or sometimes you download merged sets. How you store your roms is completely up to you. I choose to keep all my rom files split as it is easier to update however if you merge all of the rom files you can save a lot of disk space. Open the merger window from the start window...

Merger Screen

Heres a run down of the options.

What I did to sort out my rom sets was to run merger and select "Non-Merged Sets" which created a set of roms with all the necessary files they needed to run in them. This used up 3.5GIG of hard disk space. I then ran scanner as if they were split sets and removed all of the unneeded roms. This left me with only split rom files and no merged ones.