It's possible, but not by default.
If you have enough sql server knowledge you can get it to work using the data transformation services build into sql server.
With this you can transfer from datasource A (branch sqlserver) into datasource B (central SQL server)
http://en.wikipedia.org/wiki/Data_Transformation_Services
Take your time to look at the documentation, if you can't get it to work please let us know.
The only tricky part to merge all the data is to make sure that the "computername" is unique in all locations.