You can specify command line switches within Actions that Launch Programs.
"outlook.exe" /c ipm.note /m "Tom Smith"
...will open a new Outlook Email Message and put "Tom Smith" in the TO field (without the quotes). Use straight quote marks to enclose command line switch input containing spaces.
Another example is using switches to open a Microsoft Word template file as a regular document. For example:
"winword.exe" /t c:\coverletter.dotx - will open the file as a template, while:
"winword.exe" /tc:\coverletter.dotx - will open the file as a regular document using the template.
When adding or editing any Action with a file path containing spaces, put the path statement within straight quotation marks.