Its a Plesk server, does this mean anything?
Plesk is probably your web-interface - I would assume you are running Apache underneath.
I actually attempted to upload an htaccess from a colleagues site who successfully runs podpress and statistics.
WordPress will write the contents of this file for you but you have to make sure the filename exists and that it is writable. So its fine that you uploaded the file from your friend's server. You just need to make sure that it is named .htaccess (note that the period is required there) and that the file permissions allow writing by the PHP script.
What FTP client did you use to upload your friend's file? Filezilla? If you are using a webinterface from your hosting service can you view/change the filename? Whatever client you are using, check and make sure it is named .htaccess - Then find an option like "file permissions" and set it to 666 or 777. (note that this makes the file writable by anyone so be sure to set it back later)
Now log in to your WordPress admin console and navigate to settings | permalinks. Choose a non-default setting - like "numeric" and then click "Save Changes" If the file is in the correct location and the permissions are correct WordPress will show you this message "Permalink structure updated." That means that the .htaccess file contents has been written and should work fine. If you see an error message please report that message here.
Then go back and change your file permssions on the .htaccess file to 644 or whatever the other files are set to on your server so that a hacker doesn't try to use it to compromise your site.
I don't mind helping out but this stuff is pretty basic and is all included in the WordPress documentation. You should learn about files and file permissions if you plan to use a self-hosted WordPress install.