... sfs extractor works just fine provided you have all file-names present in filelist.txt ,which means that you need all filenames for new sounds and ones that has been changed through patches.

reg.
Z

In order to find out what sounds have been requested and successfully loaded
in your last session, you can use the log function Il2 provides.

To do so, you need to add the following configuration to your conf.in sections:

[Console]
HISTORY=1024
HISTORYCMD=1024
LOAD=console.cmd
SAVE=console.cmd
LOG=1
LOGTIME=0
LOGFILE=log.xls
LOGKEEP=0

[sound]
DebugSound=1


This configuration enables a log file that will use an Excel file format.

When analyzing your logs, you will learn that the Il2 engine will first try to load specific engine sounds (like DB605AM and DB605DB for example or various Merlin engines) and when that has failed, will attempt to load a family of sounds (like the DB605 generalized sound used for all engines of that specific family). That means, you could use specific sounds for each DB605 sub-type or only one set of sounds for all planes using a DB605 variant.