Costomize wordpress form plugin

Hello, I would like to make some changes in this plugin. Basicly this plugin allows to put into the form many fields like slider, number field, checkbox, select box etc. Each of them has their own price and quantity value, which are used for further calculations. There is also multifile upload form which doesn't have price and value built in. So I need you to customize this plugin for me so user can perform actions as fallows: 1. There are few multifile upload fields on the page, each with different price. It looks like here: [login to view URL] photoprinting company is good example. first upload field is for 9x13 photos, second for 10x15 photos etc etc. Each upload field must have it own price value. for example 9x13 = 1$, 10x15 = 2$ etc So I need every uploaded file to have default quantity 1. Then user can increase/decrease number of every image, or delete it. (see attachement) 2. Each upload field has it own price, so plugin needs to be able to sum up all copies in given field and multiply by price, like in other field types available in plugin. 3. then workflow is standard for this plugin. It sum up everything and shows final step of the form. 4. NEXT CUSTOMIZATION Uploaded files from each filled form are currently saved in folders like: 5afsd8gfd53/, 5asf567af8/ etc I would like to make it like: formname/ordernumber/uploadfieldname/quantity (there is already defined order number by the plugin for every submited form) Uploaded files need to be saved in subfolders which is named after upload field. So if upload field has title 9x13, there should be formname/ordernumber/9x13 with files uploaded from this field. It would be good if I could change field names and it should also change folder name. Next subfolder is simply number of copies of given photo. So if user choose to have 2 copies of picture1 and 1 copy of picture2 & picture3 all in size 9x13 there should be generated: formname/ordernumber/9x13/1x with files picture2 & picture3 and formname/ordernumber/9x13/2x with picture1 ------------------------------------------ I would like also ask for separate quote of all above + integration with: [login to view URL] ideally additionaly to selection of copies on thumbnail, there would be button to crop image in selected ratio