Hello,
Do you control the server (ie: have root access)? If so, then it might be better to do this from server side, adjusting variables there, instead of interfering with the script itself.
I can take a look at the script , see what's what, and move on from there, if you like.
If you'll look at my profile (https://www.freelancer.com/u/twhiting9275.html), you'll see 100% positive (5 star) feedback, high completion (I don't abandon projects, but there are times employers take work and cancel to avoid paying) and a link to my own site where I've done the same for better than 10 years now. Your project will be completed with the same diligence and persistence. Your task will be completed within the advertised period of time, and be given everything needed to be done right.
I look forward to hearing from you and working with you on this project.
Tom Whiting