Thanks Nagarajan, having a look at the thread, it puts the onus implementation to "re-invent the wheel" so-to-speak.
I wondered if someone had developed a data extraction from R3 which would fit nicely into the relevant DTW spreadsheets.
If not, I understand and will work from the premise that I will need to start from the beginning. I suppose I still have to find out from the client how much he wants to bring over, so it may not actually be a huge issue.
Thanks again!