Run registry files in a batch file

call regedit /s c:\path\filename 

Example of this is:

call regedit /s c:\regfile.reg

*** NOTE ***

You can use this inside a regular .bat file to make registry changes on PC's or you can insert this code into a login file and run a reg fix for all users of that login script. You can substitute to path with a UNC code like (\\servername\sharename\filename)