Okay, let's clear up a few things here, I'll touch on some that lancashiredates has already touched on and a few others:
1. php.ini is controlled by your host if your on a shared server environment, often you will even find this to be the case when it comes to VPS servers. My site is on my own server with no one else (we won't get into specific details) but even then the php.ini came from the host. Dolphin Install requires a php.ini file, because it uses php, but it does not provide the php.ini file, so go see your host about that problem.
2. You can upload a thousand php.ini files, but if the host has the servers root php.ini set to not allow you to overrule the settings it will do you NO GOOD!
3. I have e-mailed Boonex support before, allowed them to access my server and received awesome support out of them. In fact, I have learned to e-mail them with problems Sunday night through Thursday night and I will have the answer the next morning. Any time they have gone into the server to fix something, I always get an e-mail from them stating what the problem & cure was with the problem corrected. The reason they tell you what it was is very simple:
If it happens again, you can fix it your self!!! Would you prefer they fix it and give you NO SOLUTION to it.
4. Now as far as the 404 error goes, start out by checking .htaccess has mod_rewrite ON That is the most popular problem. Then start paying attention to what the site is supposed to be set at. Check CHMOD Permissions, what did you accidentally remove from your Dolphin files that should be there?
It would be much better to get a little help for your site if you took a moment to come in here, post what the problem is, what version of Dolphin you are using, what your server is (Linux, Windows, Shared, VPS, Dedicated, Cluster) and so on. In your case, I'd also request the php & SQL versions your using and finally the URL for the site so it can be checked by us to attempt to locate your problem. The last item, but still very important is this:
In your e-mail, what is the site error(s) your getting? Believe it or not, your server will usually tell you what the problem is so you can fix it, servers love to do this, it makes them feel important to provide the answer to you and gives them a feeling of self worth.
Now, you can either suck it up, start asking quesitons in the correct manner, pay attention to those who have working sites, and begin to pay ATTENTION to what other site owners, hosting companies who frequent the forums and other such as mrpowless and ArturA who have a vast knowledge with this software. I have not seen a PROBLEM a site has yet that has not been curable, although we do have the ones who want to chauffer them around town that hasn't been integratable yet.
Overall, Dolphin is an awesome scripting program, that puts others such as Joomla & Drupal to shame. You wish those programs could/would do what Dolphin does then you wouldn't even be in here looking at Dolphin. It's not our fault you wanted a basic site that was ready out of the box and lacked the ability to fully research it and realize Dolphin has requirements that must be met by the hosting company you choose, takes a certain amount of knowledge or willingness to learn (and all who frequent this know this is my FIRST site that I've built and I have used Dolphin for it) that you obviously lack both of.
Have a nice day and when you decide you want your site to actually work, come back in here politely and we will give you a hand.