The disk name for RAM Doubler is simply "RAM Doubler" . The Speed Doubler one is almost certainly just "Speed Doubler" . Admittedly my RAM Doubler installer is 1.6.2 so it may be older and more basic than yours.
If this doesn't work try duplicating the disks and running the duplicates. Might make a difference.
If this doesn't work try duplicating the disks and running the duplicates. Might make a difference.