Hi Prazeman:
There is a simpler way.. Get a program to convert syx-files to mid-files. This creates a midi-file that contains sysex-data that can program your synth..
Load the midi-file into the sequencer and press play.. The sound will place themselves in the user-bank, so be sure to have a backup-floppy with you own user sounds...
I used to know a page where a syx-to-mid program was available, but it is closed now.. Just look around on XP/JV-related page and see if you find something..
Stig