In this version of ghost it has the new WINPE pre-os ,Where it consist of all the latest and required drivers for imaging the latest machines.
I guess now u must be using PCDOS as pre-os in the older version..right??
-PCDOS totally runs on a different concept when compared to WINPE,PCDOS runs on the dos and the WINPE operates on the windows vista 32bit.
-WINPE has the major hardware compatibility.
-Storage drivers can be added to the WINPE template.
So when you are using the GSS 11.5.1.2266 you can use the incremental backups only through the console.