Based on the below post I just read:
It sounds like this may be something I can do to get my custom page template to show up on the Edit page Admin screen (in the dropdown list)
My situation is that I created the custom page template, put it in my theme folder, it comes up in the Widgets section for adding sidebars for that specific page template, BUT it is not listed in the dropdown list when I edit a page (the dropdown shows up and has other page templates, just not the new one I just created)
Based on the above post, I am thinking I can just ftp my customer page template to the other theme folders. Because of the extent of pages, and changes I have done to this site so far, I don't want to change the theme incase that would cause more problems.
Will just FTP'ing my custom page template to the other theme folders be enough given my situation briefly explained above?