1) I am using Sibelius version 7.5. My first aim is to transform every 4/4's bar into a 4/2's bar with a whole note rest at the end of every measure in the score.
2) My second aim is to replace every whole rest (at the end of every measure) with quarter notes from the other Sibelius file, which is called "Modal Functions"
3) The mistake that i get when i select bars 1-16 (home–> select bars–> end of score) and change time signature from 4/4's to 4/2's (notations–> time signature) is that all the notes end up in one bar, since i specifically only aim to change the key signature (of every 4/4's bar) to 4/2's and to leave a whole rest after the first four quarter notes in every measure.
After that i am unclear about what goes after the process of changing time signatures while later inputting quarter notes from the other Sibelius file into the 4/2's measure endings (whole rests).
Postscript: i don't want to take the time to do it by hand (on bar after another bar) for the reason that it consumes time and i have a lot of other Sibelius files unsorted.
Also, it wouldn't matter for me if the chord symbol above the staff does not copy itself.
An easier method below suggested would be very appreciating.