MathML equation editor + code cleanup

I have written a prototype of a PHP/MySQL website which essentially does two tings: (1) provide a dynamic user interface for the collection of data on financial products and the storage of that data in a MySQL database, (2) help manage team workstreams and (3) a few ancillary functions. I would need help with two things: (1) Cleanup of code. The website as it currently stands is a prototype. The code works but it is not well-documented and it is not modular enough for future expansion. I would like someone with professional-level PHP expertise to either adapt the code or redo it from scratch. The goal would be to have code that is compact (perhaps switching from scripting to object-oriented programming), easy to maintain and expand, and well-documented (using PHPDocumentor or similar tags). For the workstream management part of the website, this should be very easy to achieve, for the part that provides the user interface to collect data, it may require a bit of tinkering because of the interaction between PHP and javascript. (2) MathML equation editor. This part that has not been coded yet. As I said, I did a data collection interface that allows users to create financial products. But right now the universe of financial products that can be created is limited because the interface relies on predefined variables/formulas (displayed as GIFs), which the administrator has to feed into the database and which users can't modify. I would like to make the system more flexible by adding an online MathML equation editor to allow users to create their own variables/formulas. Tools that come to mind are: ASCIIMathML ([login to view URL]~jipsen/mathml/[login to view URL]), ASCIIMathPHP ([login to view URL]) and Mathador ([login to view URL]~milani/mathador/[login to view URL]). Feel free to use Java, Flash, whatever. My bid range is $300 to $1,000. In addition, if the MathML equation editor and its integration with the data collection interface does not just satisfy my requirements but is truly excellent (e.g., because the user comfort approximates that of the Microsoft Equation Editor), I am willing to pay a bonus. M.