Just found out, Netsh.exe did the job!
Look here for all netsh commands:
http://www.microsoft.com/resources/d...etsh_dhcp.mspx
Piece from the action:
Netsh DHCP server
The following commands are available at the dhcp server> prompt, which
is rooted within the netsh environment.
To view the command syntax, click a command:
add class
Adds a class to the specified DHCP server.
Syntax
add class ClassName [ClassComment] [Data] [[IsVendor=]{0 | 1}]
[[IsBinary=]{B | b}]
Parameters
ClassName : Required. Specifies the name of the class to create.
ClassComment : Specifies the comment to associate with the class.
Data : Specifies class data in ASCII or binary format depending on the
IsBinary parameter. If unspecified, it is assumed that the format of
the data is ASCII.
[IsVendor=]{0 | 1} : Indicates whether the class to add is a user class
or a vendor class: 0-User class (default), 1-Vendor class.
[IsBinary=]{B | b} : Indicates if the class data is in binary format.
If unspecified, it is assumed that the format of the data is ASCII.
Examples
In the first example, this command creates a vendor class named
MyClass, with the comment TestClass, and the class data
TestDataForMyClass in ASCII format.
In the second example, this command creates a user class named
MyUserClass with binary data of 4345335532 (ASCII-CE3U2).
The third example is an alternate command syntax for the second
example.
add class MyClass TestClass TestDataForMyClass 1
add class MyUserClass TestClass1 4345335532 B
add class MyUserClass TestClass1 4345335532 0 b