Win500: Copy and paste CC P500file to up from scan

This has likely been covered; I'm trying to copy and paste CC's from a P500file (in Win 500) to the window that opened and shows From Scanner. Once I updated the CC's (via copy and paste the whole list of 24 freqs from the file) I wanted to shoot it back to the scanner. It looks like I have to go one by one to copy and paste. Select all highlights the freqs but does not carry them over. Control C/V only seem to line by line as well.
Perhaps saving From Scanner as a file then the edit is the only way?
Edit: creating a file to toggle back and forth did not work either.

Thx!!

Cut and paste to notepad from Win500 CC field put them in a column and copy paste back to Win500. Then back to scanner. Mission accomplished but it seems like quite a bit of work.