I'm ashamed to say I gave up as time was against me. I scripted it out instead.
Example of script code used: -
d:
md vmware
cd vmware
copy "\\nds01\express$\Files\VMware Windows Vista\*.*"
I know it isn't the way I thought I could do it but I'm beginning to think it is a limitation on altiris that is stopping that big of a directory being copied.
Have a go at a run script job to copy your file and see how you get on!
Regards,
Tony