When you say "implement that template on Inventor" do you then mean, implementing functions in the template, settings, og do you mean the titleblock.
As i understand you you mean title block... makes most sense to me
Making a template is relatively easy, you just save your (in this case) IDW, in the Template folder. See Application Options --> File, or look in your project file, that can be set up to overrule it.
If you start a new IDW you can choose to create a new title block, and then you should be able to copy - paste the titleblock from the DWG you got from a client.. you will propably need to adjust it to make it fit and so on...