install apk extracted from other stock firmware or roms deodexed - help

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http://forum.xda-developers.com – Hello everyone, I hope I have posted in the right section, I have to ask you a question that despite several hours of trial and research remains to me: I was going to download the firmware official google nexus 7 and take the apk that interest me, and install them on our tablet 7plus. I downloaded the version both deodexed and odexed of the google nexus 7 and I extracted, for example, the contacts.apk DEODEXED from it.Installing the apk android ics stock tells me: error with the analysis of the packet. I also tested with version odexed putting the apk file and the odex file into the folder s (HowTos)