MAS Project

I am in the Intermediate Level and have been told about the project, so we can get a head start. I dont really want to base the project on the company i work full time for, but instead base it on my dads business, he does most of the accounts work, but i check over things for him, create reports, etc, none of this is paid, do u think this will be ok? there are many changes that i could make with his business that would benefit him, and i feel my work wouldnt allow me to make any changes, or even suggest some! i read on here this morning that u need your employer to sign a letter to approve your project, will my dad be allowed to do this? is there anyone that has based this project on their own buisness and how signed off their report? Any help would be much appreciated<BR>Thanks