It depends what is in the macros. Without knowing that it might be better to create a third macro e.g.
Code:
Sub MyMacro()
Call MacroName1
Call MacroName2
End Sub
where MacroName1 and 2 are the names of your macros.
To see how that works try the following
http://www.gmayor.com/installing_macro.htm
Code:
Sub MyMacro()
Call MacroName1
Call MacroName2
End Sub
Sub MacroName1()
MsgBox "This is MacroName1"
End Sub
Sub MacroName2()
MsgBox "This is MacroName2"
End Sub