Jeff Harrison has some video tuts plus a link to a very helpful addition to DRAW which makes applying numbers to tickets, invoices, etc. much easier.

The link here has a couple of excellent tutorials on how to put it all together.

If you ever need to number, and it is just a matter of time before you will be asked to do a merge, this is good to know. I've bookmarked it because it is something I'd want to have as a ready reference.

http://www.unleash.com/jeffh/numbering/