[c20091929]

The most simple way is to trick the program that postsetup is the same as the one installed so you need to replicate postsetup folder structure and put there just site.xml and then point the program to that update folder. Like this it will think at each check-up that postsetup is the same.

Example:
Create this folder structure:
X:\PS\ODIS_Engineering\Trade-Retail\software\update\
for engineering and
X:\PS\Odis\Trade-Retail\software\update\
for service and in the last folder update add your postsetups site.xml file.
Open Administration in odis and at mirrorserver 2 add as source of update in our case X:\PS\

Just a follow-up question. 
Is there a way to update the VAS6154A driver in older ODIS?
I think ODIS 7.2.1 or ODIS 12.2 has 6154A driver as 21.XX but the latest ODIS 23.1.4 has driver 28.XX. 

Thanks!