Ok the xml is a file which is located in the folder you have installed Mach to, usually C:\Mach3.
There are several xml's there but the one you want is for the profile you are using, for example if you are using the default Mill profile it will be named Mach3Mill.xml, if you have made a custom profile it will be the name or your profile.xml.
The macro folder is also located in the C:\Mach3 directory and when you open that you will see more folders, go to the one of your profile (Mach3Mill or whatever) and you will see the Tools3.dat there.
As said above you will need to copy both fles to for instance your desktop and rename them before the forum will accept them, suggest you call them Hillbilly.xml and Hillbilly.dat.
To attach the files you use the aditional options button on the reply page then browse to the loacation of them on your drive.
Hood