As I stated, there is a lot of tweaking to be done. If you have not had experience with YEM you will find it takes time. You can assign a limited number of DSP effects from YEM. Getting the right amount of Reverb is also critical. The Volumes are also critical. This is set in the COMMON parameters (Voice Set for R and L Voices)
Create a new Pack in YEM, then Import the SF2 file as Content. It's been awhile but I think the Voice names will display correctly. You will also want to assign a LSB. YEM will do this for you, but you might want to change it. After installing the new pack in your keyboard, it is then you will use Voice Set on the keyboard to tweak the Voices. You can save the adjusted Voices as User Voices or you can have YEM running and duplicate the same settings in the COMMON parameters of the YEM Voice Editor. Those setting of the COMMON parameters will become the Voice Set File when your pack is installed.
Once you get all the Voices to your liking do the following:
1. IMPORTANT - Export the new pack with all your new settings
2. DELETE the new pack from YEM after you have just exported
3. IMPORT the new pack with all your new settings (this is to purge YEM of extraneous data)
Now you can create a new .ppi file with all your new settings and install once again in your keyboard. Every time you make edits to the new pack follow the above procedure. It will keep YEM from getting corrupted.
Good luck with your experiments.
Joe H