Hi Nikki>I have a simple form set up and when I add a new record and then undo before saving I recieve an Index out of Range Exception.
I believe that the version of the framework you have is likely the cause of this issue. I had a similar problem a few months ago that I reported to the StrataBoys and they promptly fixed it 
So, don't worry, it's likely that you aren't doing anything wrong.
>Also are parent-child-grandchild BO relationship's supported on one entry form?
This is just a conceptual hurdle really. You could have more or less any depth of relationship on any form. In a SF business object, you have the concept of a "parent BO". So, a grandchild BO has a parent; a child BO has a parent and so on. When you try to create this sort of relationship on a form, the main thing you have to consider is the propagation of the parent's primary key as the foreign key in the child BO. If the relationships are set up between the BOs, then SF will take care of this for you in inasmuch as SF will force a parent record to be committed before the child, if the child is relying on the parent's PK for its own FK value. This is usually the case if you are using something like SQL server and PKs are being generated by the use of identity columns in the SQL server tables. So, the PK/FK issues are taken care of for you by SF.
Another thing to consider is the reselection of your grandchild records if you move a child record, and the reselection of child records if you move the parent record. This can be achieved by a couple of carefully placed "Navigated" event handlers. When the parent record moves, you handle this event and reselect the child records. When each child record moves, you handle that BO's navigated event and reselect the grandchild records.
I say "reselect" here deliberately. In SF, you can have a parent BO effectively "filter" matching child records. However, this is filtering existing records in the child BO, if you want to get the "latest" child records on the server, then you would need to Fill or Append these records from the server into the child BO.
>Great Job so far!! I tried to use Mere Mortals and I guess I am just not that good of a developer
Its got precious little to do with how good a developer you are. IMHO, Mere Mortals is not intuitive or easy to learn for a new user. So, don't beat yourself up about it 
Best
-=Gary