You will first need to create a Multi Insturment in Logic's Environment :
1-Open the environment window (command-8)
2-Select the "MIDI Instr." Layer.
3-Select New > Multi Instrument
4-With the Text Tool, rename the multi Instr. Object "Motif ES".
5-With the pointer tool, activate each of the 16 channel buttons on the Multi Instr. object.
6-Double click the Multi-Instrument object and type in all your patch names.
By the way, Logic used to come with a Various Multis file with many synth patch names but this file is now outdated. For older synths, it is still available here :
Maybe you can find the patch names online and paste them... it would save you a lot of time!