If you have a Joomla 1.5 x website and want to upgrade it to Joomla 2.5x then this post has been written for you.

Migrating a Joomla 1.5 installation to Joomla 2.5x is a massive undertaking & a steep learning curve for beginners.  So I’ve written a detailed set of instructions based on my own experience with upgrading my New Zealand-based adventure website, Adventure NZ

Here is the link to read the instructions online:-

Upgrading Joomla 1.5 to 2.5 including Sobi2 to SobiPro

Alternatively, there is a PDF version at a cost of US$5 which you can download:
Click on this Buy Now Button to get the PDF:-