How do you reinstall Dreamweaver CS3 using WindowsXP and retain your site definitions?
Export your site definitions
Site > Manage Sites, Export
http://www.adobe.com/devnet/dreamweaver/articles/site_definitions_03.h tml
Re-install DW
If they don't apppear in the Site Manager automatically then Import your site definitions
Site > Manage Sites, Import.
I also recommend reading this before reinstalling: Reinstalling Dreamweaver (or Extension Manager) fails to resolve problems.
North America
Europe, Middle East and Africa
Asia Pacific