Click Add Resource Requests from Template on the Resource Requests related list of the opportunity or project detail page that you are requesting resources for.
Select a project template to copy resources from.
Click Select.
If resource requests are available on the selected project, they are listed in the Resource Request Mappings section. Ensure that the resource requests you want to copy are selected and the ones you do not want to copy are deselected. If no resource requests are available on that template, click Back to Templates and select another template.