Yes - just open up Notepad and paste AddType x-mapp-php5 .php into it.
Then go to 'File' > 'Save As' > and for 'Save as Type' select 'All Files (*.*)' and give it the name .htaccess . This is the precise name of the file, there should be no 'txt' after it.
Upload this .htaccess file to the root directory of your remote site.