Added folder hs_app_idlefw, files there have 'hs_app' prefix(content edited). homescreen_srv compiles with these changes. Although more warnings appear. Also I've changed uid of homescreen.exe, ailaunch.exe. Renamed idlefw files, located in hs_app_idlefw.

<?xml version="1.0" standalone="yes"?>
<backup_registration>
  <passive_backup>
    <include_directory name = "Content"/>
  </passive_backup>
  <restore requires_reboot = "yes"/>
</backup_registration>