Thank you so much for making the Prophet X community so awesome Lady Gaia! I'd really love to load your 9,000 Foot Piano presets, but I have the BlueWave presets in U4 and I would like to avoid overwriting them if I can. Are there any quick tweaks I can make to the sysex file to load into U2 instead? Much appreciated!
If you're comfortable with a hex editor to manipulate the file directly? Sure. The single preset SysEx format for the Prophet X is actually documented in the manual, but for convenience here's a summary of the relevant bits:
The SysEx dump for a single preset should begin with:
F0 01 30 02 <bank> <program>
The <bank> for my original 9000ft Piano preset is 03 (User banks 1-4 are numbered 00, 01, 02, and 03 respectively.) The <program> for my preset is 7F which corresponds to slot 128 in the bank (again, zero indexed so 00 = 1, 01 = 2, all the way to 7F (127 in hexadecimal) = 128.) If you're confident you know what you're doing you can edit this directly and then send the altered file to your Prophet X to load it.
If all this sounds unfamiliar or you're otherwise uncomfortable with it, you can always just make a copy of the preset in bank 4, slot 128 before loading the existing piano preset, then copy that to where you want it, and copy the backup you made into 4/128 again to restore that bank to the way it was.