Habe ich bereits probiert. Das Ergebnis war niederschmetternd.
2010-02-06 1817.764 iTunes.exe[748:1300]: restore library built Aug 24 2009 1155
2010-02-06 1817.764 iTunes.exe[748:1300]: iTunes: iTunes 9.0.2.25
2010-02-06 1817.764 iTunes.exe[748:1300]: iTunes: Software payload version: 7D11 (option key)
2010-02-06 1817.803 iTunes.exe[748:844]: iTunes: Specifying UOI boot image
2010-02-06 1817.804 iTunes.exe[748:844]: AMRAuthInstallAttemptSimpleHttpRequest: attempting to connect to
http://gs.apple.com:80/
2010-02-06 1818.292 iTunes.exe[748:844]: _AMRAuthInstallIsHttpServerResponsive: server reponse status code: 200. status text: OK
2010-02-06 1818.303 iTunes.exe[748:88c]: <DFU Device 062A1498>: operation 44 progress -1
2010-02-06 1818.304 iTunes.exe[748:88c]: phoning home to gs.apple.com:80
2010-02-06 1818.304 iTunes.exe[748:88c]: tss_add_entry: ApECID
2010-02-06 1818.304 iTunes.exe[748:88c]: tss_add_entry: ApChipID
2010-02-06 1818.304 iTunes.exe[748:88c]: tss_add_entry: ApBoardID
2010-02-06 1818.305 iTunes.exe[748:88c]: tss_add_entry: ApProductionMode
2010-02-06 1818.305 iTunes.exe[748:88c]: tss_add_entry: ApSecurityDomain
2010-02-06 1818.305 iTunes.exe[748:88c]: tss_add_entry: UniqueBuildID
2010-02-06 1818.305 iTunes.exe[748:88c]: tss_add_entry: @Locality
2010-02-06 1818.305 iTunes.exe[748:88c]: tss_add_entry: iBSS
2010-02-06 1818.305 iTunes.exe[748:88c]: tss_add_entry: iBEC
2010-02-06 1853.379 iTunes.exe[748:88c]: [tss] error from server=94 (This device isn't eligible for the requested build.)
2010-02-06 1853.379 iTunes.exe[748:88c]: server error (94): This device isn't eligible for the requested build.
2010-02-06 1807.509 iTunes.exe[748:1300]: iTunes: Restore error 3194
Teilerfolg hatte ich nur mit einer CFW. Da gab es "nur" den Fehlercode 1600