How can create a document with different page numbers?

If you want create a document like this:
 from 1 to 9 --> insert page numbers I to IX
 from 10 to 20 --> insert page numbers 1 to 11
 from 21 to 100 --> insert page number 90 to 160
do this:

Word 2003:
1. Insert > page numbers > format > number format > I , II , III , ...
2. bring cursor to the end of page 9
3. Insert > break > next page . Here you created a section break that allow you to change number format. Look at number of section:

It chganed to Sec 2.
4. Click twice on number of page and open it.
5. Click on "link to previous" in "header and footer toolbar" and turn off it.

6. Insert > page numbers > format > number format > 1,2,3,...
7. Insert > page numbers > format > start at : 1 , OK.
8. bring curser to the end of page 11
9. Insert > break > next page . Here you created section 3
10. Click twice on number of page and open it.
11. Click on "link to previous" in "header and footer toolbar" and turn off it like step 5.
12. Insert > page numbers > format > start at : 90

Word 2007
1. press "Alt + I" then press "u" to open page numbers dialogue box. Click on format and then choose number format : I,II,III,...
2. bring cursor to the end of page 9
3. press "Alt +I" then press "b" to open "break" dialogue box. Click on "next page" from "section break types". Here you created a section break that allow you to change number format. Look at number of section:

It chganed to Sec 2.
4. Click twice on number of page and open it.
5. Click on "link to previous" in "header and footer tools" and turn off it.
6. press "Alt + I" then press "u" to open page numbers dialogue box. Click on format and then choose number format : 1,2,3,....
7. In the same dialogue box, there is "start at". Change it to "1" and Ok.
8. bring curser to the end of page 11
9. press "Alt +I" then press "b" to open "break" dialogue box. Click on "next page" from "section break types".  Here you created section 3
10. Click twice on number of page and open it.
11. Click on "link to previous" in "header and footer tools" and turn off it like step 5.
12. press "Alt + I" then press "u" to open page numbers dialogue box. Click on format and then "start at : 90"