[RocketSurgeon]

So decided to give a go little utility designed by Pshoey,to convert fsc to xml and import using ista-p. Could someone with more knowledge than me, shed some light on how to use it? I've tried drag&drop files in opened window but all l get is Windows prompt to specify what program to use to open fsc files. Thanks in advance

I found the easiest way is to write a batch file to run the whole thing. Basically you issue commands to the converter utility through command prompt. I dropped the unsigned .fsc files and the fscs.der certificate into the same folder with the FscToXml.exe utility. Create a batch file in the same folder with the converter. My batch file contains the following
"FscToXml C:\Users\User\Downloads\FscToXml/fscs.der C:\Users\User\Downloads\FscToXml\001B0001.fsc
FscToXml C:\Users\User\Downloads\FscToXml/fscs.der C:\Users\User\Downloads\FscToXml\006F0001.fsc
FscToXml C:\Users\User\Downloads\FscToXml/fscs.der C:\Users\User\Downloads\FscToXml\009B0001.fsc
FscToXml C:\Users\User\Downloads\FscToXml/fscs.der C:\Users\User\Downloads\FscToXml\009C0001.fsc
FscToXml C:\Users\User\Downloads\FscToXml/fscs.der C:\Users\User\Downloads\FscToXml\00170001.fsc
FscToXml C:\Users\User\Downloads\FscToXml/fscs.der C:\Users\User\Downloads\FscToXml\00190001.fsc"
Your file locations will differ from mine, but running the batch file like this will spit out all the .xml files in one step.
Bear in mind that the Vin will need to be changed for each of the .fsc files, but that can be done easily with a hex editor like HxD if you can't get FSTOOL running.