What profile do you use for Mach? Do you just start by clicking on the Mach3Mill icon? If yes then look for Mach3Mill.xml, you will have to copy it to another location then rename it to something else, Hugo.xml for example. You can then attach it to a post by using the additional options button. If you dont rename it you wont be able to attach it as someone else in the past will have attached Mach3Mill.xml and the forum will only allow one example of each.
Hood