Nexus 7 grouper, manual update fails

I have a Nexus 7 (2012, grouper) which so far I have kept on 4.1.2 (JZO54K) using FOTAkill, but now I want to update to 4.2.2. I also have the latest CWM recovery (6.0.4.3).

I plan on applying successively:
094f6629314a.signed-nakasi-JOP40C-from-JZO54K.094f6629.zip
then
659e6288b87d.signed-nakasi-JOP40D-from-JOP40C.659e6288.zip
then
6ece895ecb23.signed-nakasi-JDQ39-from-JOP40D.6ece895e.zip

Using ADB I tried to apply the first update, but it fails. I also tried applying it from /sdcard, but the same thing happens. The error message happens after "verifying current system..." and it consists of:
assert failed: apply_patch_check("/system/app/Browser/ProviderProxy.odex", "21a896ab...
E: Error in /data/media/094f6629314a.signed-nakasi-JOP40C-from-JZO54K.094f6629.zip
(status 7)

I tried downloading the zip update again, but it still fails. I downloaded it from http://android.clients.google.com/pa...K.094f6629.zip

Recovery Mode fails to load

When Recovery Mode is selected, the phone reboots back to the bootloader. Recovery Mode fails to launch.

I've been trying (and failing) to flash CM using ADB and Fastboot.

Please help....

Which is fastest most stable no camera fails rom?

Exactly as title. Dont have much free time to test so... Need the best rom with best speed and no camera errors. Im guessing the base of this rom in mind is based on cm11 but which cm11 based rom. Best ive found so far is liquidsmooth but it has camera fails "cant connect camera" something way too typical with galaxy s3. Never seen anything like it on any other device...

Thanks in advance

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Decompiling systemui odexed always fails?

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my systemui.apk is odexed... i have used universal deodexer v 5 by abcdjdj but it always fails.... can anyone help?

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Cwm recovery starts but can't mount USB
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If I try flashing from cwm it gets lagged n nothing happens
Same while factory reset ... HELP MEe pleaseeee.,.