adjustments to a site and its admiin panel

I have completed project. However, i need some changes. Here is a completed site with an php admin panel. You can view the site via [login to view URL] (i am using dynamic ip so if its broken contact me) i uploaded codes too feel free to download. Bug in admin panel : when you add an image in to a product. panel duplicates the image and put two images. Change at brand table : third section product section have a list of brands (2rows) . If i add more brands too it it should have more rows. Admin panel text change : you can upload pictures via admin panel . some pictures have specific width and height . these should be written in admin panel. Admin panel password protection : i need simple pasword protection for admin panel. not login page !!! ç just a text field that must be a specific string. there are some minor things that should be changed too. check [login to view URL] in attached files Lets be clear on this. I will not release mile stones before you send me codes. If you have problem with this please do not offer service. site terminology and behaviour: at the first section, you will see a big picture under that there is 5 products. these are special products and stay under the first section.(special product table) second section ("işler" section) has a product table that contains all products including special ones. If you press "işler" button at top it will navigate to this section and 2 banner will be appear. these are filters. upper banner is type filter, bottom banner is filter by brand. if you scroll out of section banners for filters will disappear and vice-versa every section can be navigated via top fixed banner which is always visible. third section which is "markalar" section (brand section) this section contains brand photos if you click on them the description changes. every product is a photo album or video archives. if you click on a product preview picture, these will be displayed with using a tool named "pretty photo"