Requirements
1. Eclipse Web Tools Platform (WTP) from http://www.eclipse.org/webtools/, specifically the Web Standard Tools (WST) is used in this tutorial.
2. Flex 2 Builder Eclipse Plug-In from http://www.adobe.com/products/flex/flexbuilder/
Create the Eclipse Web App Project
1. Create a new project as “Web > Dynamic Web Project”.
2. Give it a descriptive project name.
3. Uncheck “Use default” and set “Directory” to the root directory where the project […]

I have found that the best way to run maven from inside eclipse is to create only one external tool named “Maven” and use the project_loc variable to specify the working directory in which maven will run. 
Here is a step-by-step guide:
1. Run > External Tools > External Tools…
2. Right click on “Program” and select “New”
3. For “Name”, type […]