Developing a an application but i, stuck with a Methodology?

[benq]

hello all

i,m developing an application from a previous one used, so i,m pretty much designing a new application from the older version.

i'll be using php and mysql and if possible some ajax for it, as the old one is using perl and some php and my sql.

Its funcationlity need to be redesigned, interface as well and other aspects as well.

i,m just stuck on a what or whos methodolgy to use, could someone point me to the right direction please.

much appreciated.

[ray326]

The ones I like best are the ones descended from Object Oriented Software Engineering that are use case driven and design with high level patterns like Model View Conroller.