magento : How to change order status by own module

magento : How to change order status by own module

References

Reference NO 1

http://stackoverflow.com/questions/15200552/magento-how-to-change-order-status-by-own-module

Reference NO 2

http://www.magentocommerce.com/boards/viewpost/216237/

Reference NO 3

http://thinkclay.com/technology/magento-custom-status-in-admin

Reference NO 4

http://www.atwix.com/magento/auto-invoice-and-custom-order-status-upon-checkout/

Reference NO 5

http://magento.uservoice.com/forums/24441-magento-ecommerce-platform/suggestions/278024-custom-order-statuses

Reference NO 6

http://inchoo.net/ecommerce/magento/create-configuration-for-your-magento-extension/

Reference NO 7

http://coding.smashingmagazine.com/2012/03/01/basics-creating-magento-module/

Reference NO 8

http://www.excellencemagentoblog.com/admin-part1-series-magento-admin-forms-grids-controllers-tabs