Addons to PHP Website

Hi, I would like some addons and bug fixes doing to my website you can see the website at www.%tri%[login to view URL] (remove percentages). The site is very slow on all PHP parts of the website, the html files load fine and fast and the other sites on our dedicated server load fine as well. I really want all the PHP script files to sped up and the [login to view URL] script in the scripts folder to use up less of the CPU as its killing the server. Also I want a modification making to the merchant panel /merchants is the directory of it in the main folder. When I add/edit other admins or merchants whatever you call them I want to be able to set that they can only see specific 'Campaigns' I can set for them to see the entire 'Campaigns' menu in general but I only want them to see some campaigns and be able to edit etc. those specific campaigns. The same with the reports/transactions menu I only want them to see their transactions for their campaigns that have been selected. Another thing I want doing is an extra variable in the intergration code on the merchants panel have a look at Intergartion code its basically some code that tracks stuff and adds a row to the database. However I want to be able to have an extra variable called CampaignName or something and if this is with the code on the website it wants to match with the cookie as usual and match up a the campaign name if its the same then it adds the row if there is no variable their then it adds the row anyway. If the campaign name does not match up then it does not add the row at all and leaves it. Thanks a lot, Matt Lovett