Right now, it is not possible to override resources of Web Engine module EasyShare. So customizing the EasyShare download page is not possible.
Please add the following line to the manifest of EasyShare:
The goal is to make it possible to override the resources (CSS, images, freemarker templates) and the web objects/adapters.
e.g. changing the format of the date on the download page, and more properties displayed for each file, ...