[Windows Mobile Development and Hacking General] lenko1:
To Downgrade to 3.08 use this:

Your autoinstall file has to be exactly like the following and you may copy it and include with the 3.08 file folder on your USB stick:

;+++++++++++++++++++++++++++++++++++++++++++++++

; Microsoft Windows Automotive

; USB Installation Directive File

; 3.8 (15128) Update from:

; 10308,10337,11038,11063,11081,11134

; 12023,12047,12058,12156,12285,13164,

;	13171, 13213, 13249, 13269, 13283, 13284, 13309, 13312

;	14073, 14122, 15042, 15050, 15085, 15091, 15109

; Other versions not supported

; autoinstall.lst (NA)

;

;+++++++++++++++++++++++++++++++++++++++++++++++

;;;

;;; The following tags are software versions supported by this update

;;;

[SYNCGen2_4.23.11038]

[SYNCGen2_4.23.11063]

[SYNCGen2_4.23.11081]

[SYNCGen2_4.23.11134]

[SYNCGen2_4.26.12023]

[SYNCGen2_4.28.12156]

[SYNCGen2_4.29.12285]

Item1 = BT4T-14D546-EE

Open1 = SyncMyRide\BT4T-14D546-EE.cab

Item2 = EA5T-14D546-AKB

Open2 = SyncMyRide\EA5T-14D546-AKB.cab

Item3 = EA5T-14D546-HB

Open3 = SyncMyRide\EA5T-14D546-HB.cab

Item4 = EA5T-14D546-ACB

Open4 = SyncMyRide\EA5T-14D546-ACB.zip

Item5 = BT4T-14D546-FB

Open5 = SyncMyRide\BT4T-14D546-FB.cab

Item6 = EA5T-14D546-AHB

Open6 = SyncMyRide\EA5T-14D546-AHB.cab

Item7 = EA5T-14D546-ADB

Open7 = SyncMyRide\EA5T-14D546-ADB.cab

Item8 = EA5T-14D546-AEB

Open8 = SyncMyRide\EA5T-14D546-AEB.cab

Options = AutoInstall

;;;

;;; The following are the 3.08.15128 image files

;;;

[SYNCGen2_3.08.15128]

Item1 = EA5T-14D546-AFB

Open1 = SyncMyRide\EA5T-14D546-AFB.cab

Item2 = EA5T-14F496-MA

Open2 = SyncMyRide\EA5T-14F496-MA.zip

Item3 = EA5T-14F657-AD

Open3 = SyncMyRide\EA5T-14F657-AD.zip

Item4 = EA5T-14F497-AD

Open4 = SyncMyRide\EA5T-14F497-AD.zip

Item5 = EA5T-14D546-BD

Open5 = SyncMyRide\EA5T-14D546-BD.zip

Item6 = EA5T-14D546-DE

Open6 = SyncMyRide\EA5T-14D546-DE.zip

Item7 = EA5T-14F496-PA

Open7 = SyncMyRide\EA5T-14F496-PA.zip

Item8 = EA5T-14F496-RA

Open8 = SyncMyRide\EA5T-14F496-RA.zip

Item9 = EA5T-14F496-SA

Open9 = SyncMyRide\EA5T-14F496-SA.zip

Item10 = EA5T-14F496-TB

Open10 = SyncMyRide\EA5T-14F496-TB.zip

Item11 = EA5T-14D546-AJB

Open11 = SyncMyRide\EA5T-14D546-AJB.cab

Item12 = EA5T-14F496-VD

Open12 = SyncMyRide\EA5T-14F496-VD.zip

Item13 = EA5T-14D546-AYB

Open13 = SyncMyRide\EA5T-14D546-AYB.zip

Item14 = EA5T-14D546-AGB

Open14 = SyncMyRide\EA5T-14D546-AGB.cab

Item15 = BT4T-14D546-EE

Open15 = SyncMyRide\BT4T-14D546-EE.cab

Item16 = EA5T-14D546-LB

Open16 = SyncMyRide\EA5T-14D546-LB.cab

Options = AutoInstall

;;;

;;; This tag runs only on Zodiac pre-release tags

;;;

[SYNCGen2_4.30.13171]

[SYNCGen2_4.32.14073]

[SYNCGen2_4.32.14122]

[SYNCGen2_3.08.15042]

[SYNCGen2_3.08.15050]

[SYNCGen2_3.08.15085]

[SYNCGen2_3.08.15091]

[SYNCGen2_3.08.15109]

[SYNCGen2_3.10.16180]

Item1 = BT4T-14D546-EE

Open1 = SyncMyRide\BT4T-14D546-EE.cab

Item2 = EA5T-14D546-AKB

Open2 = SyncMyRide\EA5T-14D546-AKB.cab

Item3 = EA5T-14D546-HB

Open3 = SyncMyRide\EA5T-14D546-HB.cab

Item4 = BT4T-14D546-FB

Open4 = SyncMyRide\BT4T-14D546-FB.cab

Item5 = EA5T-14D546-AHB

Open5 = SyncMyRide\EA5T-14D546-AHB.cab

Item6 = EA5T-14D546-ADB

Open6 = SyncMyRide\EA5T-14D546-ADB.cab

Item7 = EA5T-14D546-AEB

Open7 = SyncMyRide\EA5T-14D546-AEB.cab

Options = AutoInstall

;;;

;;; This tag runs only if none of the other tags match

;;;

[SYNCGen2_All]

Item1 = BT4T-14D546-EE

Open1 = SyncMyRide\BT4T-14D546-EE.cab

Item2 = EA5T-14D546-NB

Open2 = SyncMyRide\EA5T-14D546-NB.cab

Options = AutoInstall

---------- Post added at 10:18 PM ---------- Previous post was at 10:13 PM ----------

Make sure you copy it to notepad and and that it reads autoinstall.lst on the Usb stick.

The Usb should only have the 3.08 folder and this autoinstall.lst file.