habéis probado la manera sencilla?
1.-Bajarse Eclipse
2.- Instalar el plugin de Aptana con el "plugin-manager" de Eclipse
Instructions
To plug Aptana into an existing Eclipse configuration:
1. From the Help menu in Eclipse, select Software Updates > Find and Install... to open an Install/Update pop-up window.
2. On the Install/Update pop-up window, choose the Search for new features to install option, and click the Next button.
3. Set up a new remote site to scan for updates.
1. Click the New Remote Site... button to open a New Update Site pop-up window.
2. On the New Update Site pop-up window, type "Aptana" in the site Name text box.
3. In the URL text box, type the URL for the Aptana update site:
http://update.aptana.com/update/ and click OK.
4. Click the Finish button to open an Updates window.
4. On the Updates window, check the Aptana box, and click the Next button.
5. Choose the option to accept the terms of the license agreement, and click the Next button.
6. Click the Finish button.
7. Click the Install All button.
Eclipse installs the Aptana plug-in. To finish the installation process, follow the prompts to shut down and re-start Eclipse.
To access all of Aptana's features as they are described in the Aptana documentation, you will need to change your Eclipse Perspective to the Aptana perspective. See Changing your Eclipse Perspective for instructions on how to change your Eclipse Perspective.