- port XIP, boot and test
- if working, port SYS, boot and test
- if working, delete OEM packages, boot and test
- if working, do the special tweaks, boot and test
I beleave you can't port only the XIP, cause XIP/SYS are related, and at least you need some files from SYS be ported with the XIP...
IMP: There may be chances that although the XIP is working fine, but the windows are seen as QVGA versions. The solution to that is either of the below
XIP & SYS of the same builds or
XIP and the OS\Gwes.exe and \Base_Lang_0XXX\Gwes.exe.0xxx.mui files from same build