Hey mike2768 --
Any details on the machine your friend has? Maybe even its brand-name would be helpful.
There are maybe a number of brand specific codes - and if thats what you'll need then might be kinda helpful to know what "brand" it is. Otherwise if it uses g-code - there are a number of conversions to get your from dxf to that.
Lets us all know - there are some smart guys here and might could help.
Cheers - Jim