We are interested in export/print one view from formal module. As we want it can be an ofcial document we want to add our corporative template that have it own front page, a
Which version of DOORS are you using?
In DOORS 9.3+ IBM incorporated functions of RPE into DOORS which allows you more options for exporting, including to export to PDF. However, it wasn't until DOORS 9.4.0.1 (current release) that you could build your own template in IBM Rational Publishing Engine (RPE) and use that template inside of DOORS Directly.
So the answer is that you would need one license for RPE Full from IBM so that you can create the template you are looking for, then anyone that uses DOORS in your company could export DOORS documents using that template, without additional licenses. You also need to be on DOORS 9.4.0.1.
I have also seen some companies export to Word with their headers and footers, then use Adobe Acrobat to add in their cover pages with logos and such. However this means that only people with the full license for Acrobat can generate the documents correctly.
RPE is definitely your best bet.
Good Luck.