How about typing from shell (Linux or Windows Command Prompt - no difference):
path_to_php/php your_file.php > static_file.html
For lots of files, you can generate shell script (or batch file) doing all these calls.
Btw, under Linux, I think PHP has to be compiled as CGI to do this.
Also, for only few pages, you can always call the page in browser and use "Save as". :-)