A .reg file has the following syntax:
RegistryEditorVersion
Blank line
[RegistryPath1]
"DataItemName1"="DataType1:DataValue1"
DataItemName2"="DataType2:DataValue2"
Blank line
[RegistryPath2]
"DataItemName3"="DataType3:DataValue3"
where:
RegistryEditorVersion is either "Windows Registry Editor Version 5.00" for Windows 2000, Windows XP, and Windows Server 2003, or "REGEDIT4" for Windows 98