To transfer specific view templates from model "A" to model "B" :
1. Create a new blank model "C". With 'transfer project standards' (Manage Tab) tranfer all view templates from model B to model C.
2. In model C, delete all view templates you do NOT want to transfer or overwrite in model A.
(To delete view templates go to View tab>View Templates)
3. In model A, use transfer project standards and transfer view templates from model C.
Done
...
Most of the solutions suggested before work, especially with fairly simple projects; However, when you work with projects with a lot of information or when your two files share a lot of view templates that might have been slighlty modified, this method might be cleaner and safer.
Good luck to all, feel free to comment or suggest if you find a better way to do this