You can use as many as you like. The max per web 2.0 site is 3 so for a 1010 you can get 30 backlnks. Spin the anchors anyway you like.
For example:
Link #1
http://www.test.com/test.php - anchor1,anchor2,anchor3,anchor4
Link #2
http://www.test.com/anewurl.php - anchor21,anchor22,anchor23,anchor24
Link #3
http://www.test.com/anewurl2.php - anchor31,anchor32,anchor33,anchor34
Just be aware that the more you spin it the less effective it will be for the exact keywords. No spin will give you 30 backlinks with the same anchor. In the above example you will get 2 - 3 backlinks per anchor. There is no right or wrong way, rather it depends on your objectives and other seo linkbuilding efforts as to spin or not.
Let me know if you have any other questions. I'll be glad to point you in the right direction.
Joe