Yea thats the general way of installing it... I usually wipe cache and dalvik cache before and after installation... This is my way of doing it... Wipe cache and dalvik cache, then install from sd card, then pick the zip file, wait till its done then, i dont reboot after that, i wipe cache and dalvik cache again... Then reboot....
First thing, Always check if the md5/sha is match after you downloaded the file... Just google and youll find some good free md5 checker
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