Amending an existing free trade manager to suit my needs

Hi, I would like to have some functionality of an existing trade manager amended, and some new functionality added in order to suit my needs. The existing trade manager is free, so there are no licensing issues to worry about. However, I only have the .ex4 file, so you would need to decompile it first. I have attached the file here for you to see. This original manager was written for the exact strategy I trade by the trader whose group I am a member of. The problem is that this is only a semi-automated version and I need to add a few of my own trade management criteria in order to make it fully automated. the strategy is based on trading reversals from support and resistance levels predefined each morning, so trade entry will be manually done by setting various limit orders. The job of this EA is purely to manage the entry of these predefined levels, and to manage the trade itself when it is live.

I have attached a detailed specification, and here are the very basic requirements:

1. Retain majority of existing trade entry functionality. 

2. Amend existing functionality around the setting up of my predefined limit orders.

3. Automate the SL management rules.

4. Add functionality to the management of trade entry.

4. Add functionality for the management of trades once the trades are live.

Please accept my apologies for the length of the specification, I am not very good at explaining things concisely! I can explain any little point in as much further detail as needed! Thanks!