Here are theImdb Movie Info-2a script that works with the help of the Proxomitron program and the IMDB_[EN][HTTPS]-a script that works with PVD MOD. They both download the rating and votes information you were looking for, as well as the Metascore rating.
The following custom fields are used:
IMDB Rating, IMDBRating and Metascore for rating
IMDB_Votes and IMDB Votes for votes
IUpdated and Updated for script update info
TOP_250, TOP 250:, Bottom 100, IMDb Movie Url, IMDbID
Imdb Movie Info-2a script and IMDB_ [EN] [HTTPS] script is attached.