Thanks for your help. I was able to get Blinkfeed to install but it didn't install the HTC Service Pack; it would just say "app not installed". Did you encounter that at some point?
EDIT: Ok, I uninstalled Blinkfeed then installed the Service Pack and it installed. But then when I went back to install Blinkfeed then it started saying "app not installed".
Here are the versions of the different software that I used, I forget the order that I installed them in. (as I mentioned earlier, some of the APKs that I downloaded, had to be updated via Aptoide and other various spots on the web). If you have a problem finding any of the files, just let me know.
EDIT: A real simple method of finding any of the below files is to Google (file name (include the version number)) apk download.
Clock - 7.1.498168
HTC Account - 7.0.495204
HTC Service Pack - 1.02.485370
Location Picker - 2.4.474239
Sense Home - 7.0.498247
Weather - 6.2.836.008
Weather Clock Widget - 7.0.497815
So there it is, the mishmash of HTC software that I used to get Blinkfeed working on my phone (HTC DROID DNA running GPE 5.1, which isn't supposed to be able to run Blinkfeed ). I hope this helps you out.
Frank