I am using Drupal 7. I want to add a template for a group of nodes. For example, If i have three nodes node/3, node/4, and node/5, I want to use a particular template. Is there a way to do that? If it is, How can i do that? Or What is the best alternate method?
Now I am using page.tpl.php template for all the pages except the front page.
Have you had a look at this: https://drupal.org/node/1089656
The node--[type|nodeid].tpl.php part may be what you are looking for.
The theme developer module can be a good way to find out the proper template suggestions https://drupal.org/project/devel_themer
There are many ways to do that.
For example you can place condition on node id in page.tpl.php.
Or you can use different templates for each node like here Template suggestions for page on specific node id and inside this templates you can include same template for each group using just include.
