[Plugin: HyperDB] pull part of the remote database

Hello everyone,
i have a little problem
i am working on three websites for one company…
all of them are on different servers for different languages…
the problem is this – company has – collections of hard wood and in each collection there are several colors… so the color page has a huge table with different values… that i am doing through custom fields… the problem is this that customer does not want to change one value on one website of that table and have to login 3 times again to change couple digits on the other website… so i am looking for a solution to pull those custom fields from one database and use it on the other 2 websites… reading into the hyperDB gave me some ideas but the problem is how to just pull custom fields of some pages and display them on the corresponding pages of other websites…

if can give me some pointers would be great!
thanks for help!

http://wordpress.org/extend/plugins/hyperdb/