magento 1.3 export data to 1.7 - magento

I would like to export data (categories, products, orders, customers etc) from magento 1.3.2.4 to 1.7.0.2 version.
I tried exporting the CSV files from the 1.3 version but the associations etc are not loading properly
Is there a way for me to do it via the Database?
Thanks in advance
Regards,

Magento upgrade takes too long and never completes Please check this url, might help you as i was successful while migrating 1.4 to 1.7

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