Simple answer, no we will not. We are not being difficult when we say this we are actually trying to help you. phpBB has a reputation for being easy to install, that reputation is we believe well deserved. It is a simple process of unarchiving a single file, uploading the resulting directory/files to their intended location and entering some data in a web based form. The sequence of events, what to type where, etc. is covered in detail in the accompanying INSTALL.html documentation. If you cannot install phpBB3 the chances are you will be unable to administer or update it.
There are people, companies (unrelated to your hosting provider), etc. that will install your forum, either for free or for a payment. We do not recommend you make use of these offers. Unless the service is provided by your hosting company you will have to divulge passwords and other sensitive details. If you did not know how to use an ATM would you give a passer-by your bank card and PIN and ask them to show you what to do? No, probably not! The same applies to your hosting account details!
We think a better solution is for you to carefully read the enclosed documentation, read through our knowledge base at www.phpbb.com and if necessary ask for help on any thing you get stuck on. However, the decision is yours but please note we may not offer support if we believe you have had the board installed by a third party. In such cases you should direct your questions to that company or person/s.