PHP customizations needed to Agriya SF Platform Script

Hi, I run a site powered by Agriya's SF Platform script and I need some customizations. In a nutshell, here's what I need: At the moment, users have a single page to create a fundraiser. I would like that split into four stages with a save feature as they go in between each stage. For example, stage 1 will be selecting a category and the type of fundraiser they want to create. Stage 2 will be choosing a project name, adding description, etc. There are a number of other tweaks I want along the way and I also want the registration box to appear differently. Please send me PM if you are familiar with Agriya scrips and think you can do this job to a high standard. I will then send you much, much more detailed information of what I want. That will allow you to give me a more accurate quote for this job. I am looking to develop a strong relationship with a competent developer. Design skills are a plus for this job and because in the future I also want several design elements of my site improved. Look forward to hearing from you.