How to set up OpenOffice.org Writer numbering styles that look the same when exported to Word

Question

Here's what I need:

1. nine levels of numbering;
2. all using 10pt Arial;
3. all with a 1cm or so gap between the end of the number and the beginning of the text;
4. supporting up to 99 paragraphs at each level;
5. including all previous levels, separated with full stops;
6. each level indented 1cm or so more than the previous level;
7. the left margin of the first line of each paragraph aligned exactly with the left margin of subsequent lines of the paragraph.

Oh, and I also need it to meet all those criteria after exporting the document to Word... that's the killer. Any experts out there?