How to get wordpress 1.5

I have a blog and it runs wordpress 1.5

I am thinking of redesigning the blog and hence installed xampp on my local machine. I installed the latest wordpress 2.1. Now I attempted to fill the local data with the data from my blog. When I tried to insert the data into wp_posts table the insertion failed because the number of columns is not same.

I started looking for wordpress 1.5 . Couldn’t find it? Why is it that previous version of wordpress is not there? How should I fix this issue.