Modify The Source Code

Helo, My site running using an application bought on the market. The problem are: 1. The support from the developer is poor. When problem came, the developer just said that " the problem is not on application, but it's on your server" 2. This is the most important, that the site making outgoing calls to developers on every single queries on dynamic PHP pages. Thus, when the developer server is down, the all site under the same aplication is down. Believe me, it's down so many times. 3. The aplication is getting [login to view URL] can't run on PHP 5.3. Additional information: 1. Site is encoded 2. Site using .html template I need someone who can figure out those problem as soon as possible. I will give the detail on the next contact. Best regards, Befreeman