Hello all,
the interface language (Italian or English) is one of the options a new user is asked to specify when he/she registers at TrainZItalia and should included in the customisation options for the user (I'll look into that)
Anyway, changing the language in our website interface is easy:
1) Scroll down until you reach the page bottom.
2) Click on "Italiano (ITA)"
3) Select "English (USA)" in the contextual menu
Here are the links to the latest version of the Sherman Hill Route (v2.1a):
http://www.trainzitalia.com/forum/index.php?/files/file/68-sherman-hill-v21a-ts12/
When you click on the Download button, you will be directed to a page with two download options:
Sherman21A.zip (287.36 MB). This .ZIP file includes several CDP files, i.e. the route and all the TrainZItalia custom content. 
Please make sure you install all the CDP files you find within the .ZIP file.
Missing_kuids_2-1-A_v2.cdp (429.33 KB). This CDP files contains a few assets that were left out the above .ZIP.
We also made four session - so far - for the Sherman Hill:
HollyFrontier (DLS-only)
The Portland Rose (requires UP FEF and Challengers, see link below)
Monolith Cement (requires UP FEF and Challengers, see link below)
Heavy Metal Job (DLS-only)
You can download the sessions from this area of our website:
http://www.trainzitalia.com/forum/index.php?/files/category/18-routes-content-and-sessions/
The UP FEF and Challengers required to run two of the sessions can be downloaded here:
http://www.trainzitalia.com/forum/index.php?/files/category/17-locomotives-and-rolling-stock/