Afilliating tasks with projects through UserForm

Hi,

Im trying to create a userform which adds data to a new row under a table. But am having a few problems:

- I want some of the formula to be copied into the rows once the row is added i.e. column A nd B to be automatically generated

- I want to affiliate tasks with a project. As seen from the attached document. I need a userform with a combo box were a user can select a current project (or create a new) and enter new tasks under that project

i.e. in the attached document there is a project for "Start Planning" so some sort of function to add tasks under this heading and some functionality to add a new project and the conditional formats in the doc to be kept.

I dont really have that much experience of Excel so any help would be appreciated!!! Thanks in advance.