Multisite installation (subdirectory url)

I have two existing live sites running drupal 7 (site1.com/en and site2.com/en --> /en automatically selected for english language) and I want to unite them with subdirectory urls with seperate databases. I am following Drupal documentation for installing multi-site#subdirectory. In order to make the symbolic link I need to have ssh access to the server to run the commands. But my hosting service informed me that I am not allowed to remote access. Does anyone know if there is any alternative?

Thanks for the help!

Up to this point the steps I followed:
1. From parallels plesk I created a new database db2 inside site1 and run a backup script of site2's database.
2. Using ftp I copied /site2/httpdocs/en/sites/default folder to /site1/httpdocs/en/sites/site1.com.en.site2.
4. Inside site1.com.en.site2 folder I have the default.settings.php & setting.php site2 was using. I granted user & group write permissions. I changed settings.php to contain the new db2 information. base url was not specified in the original file (the one site2 was using) so I didn't make any changes.
5. With the copy of site2's folder I brought the original files folder
6. Inside the folder I created empty folders modules, themes & tmp.

I requested ssh access from my host and finally could run the commands.
so I made a symlink using:
ln -s /var/www/vhosts/site1.com/httpdocs/en /var/www/vhosts/site1/httpdocs/en/sites/site1.com.en.site2

I added to .htaccess the lines:
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !=/favicon.ico
RewriteCond %{REQUEST_URI} ^/site2
RewriteRule ^ site2/index.php [L]

right before
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !=/favicon.ico
RewriteRule ^ index.php [L]

And nothing happened. I still get a 404 page not found error

Anyone? any ideas?