Dolphin 6 gallery modification

i want my clients to upload pictures as they want but all of them are resized, i know they are already resized but the original picture is saved and i dont want that cause it eats the space up, if they want to share a picture or an album they will send the link with the URL and Embed as they are already, but i want to save space on my server so no uploading the whole photo, only resize version of it to the dimensions i specify in admin panel, this way i will have more space for people uploading their photos and more photos will be uploaded, also i want to add for members each one can create his own photo folders inside his account as many folders as he wants, these folders can be shown on the profile with the number of folders i specify to show, and the rest are hidden, there will be a link say show the rest of the folders or show all folder, the point of this is that say i traveled anywhere so when i come back i create a new folder saying "egypt trip" and upload its photos and so on... if any one is familiar with facebook gallery system that will so much easier to explain :-)