Hi GumbyŠ, welcome to Geeks to Go!
2. How can I transfer 7 different PST files into Outlook Calendar so I have only 1 PST file. The 7 PST files are from different jobs in which I've worked at over the years and I'd like to maintain one comprehensive calendar instead of switching back and forth into each one.
Do your PST files include other stuff besides Calendar items? Do you want to import only the Calendar items or everything?
To import the files into your current Outlook structure: Open Outlook, click File, Import/Export, Import from another file/program, scroll to Personal Folder File (PST). On the next screen, click Browse to find one of your files. The next screen deals with which folder to import and where to import the file in your current structure. Be sure to highlight Calendar in the upper portion of the screen if that's the only thing you want to import - otherwise allow the default. The safest and most fool-proof choice is "Import into the same folder in" and then open the drop-down box and choose your Personal Folders. This will import Calendar into the Calendar folder.
The import the next file.
You should make a backup of your current PST file in case things go awry.