BUS0036 : Edit document during approval process

Hello,

I have to trigger an approval workflow while user create document using GM_CREATE_BUDGET.

BO : BUS0066

EVENT Triggered : PREPOSTED

I am trying to copy and enhance standard workflow template : .WS12300099.

Once the document is posted and someone tries to change it using... it shows the message that document is under workflow and opens documents in display mode.

Now i have two issues :

1. If approver rejects it then creator is provided with an option to change document. I can handle through an activity and transaction GM_MODIFY_BUDGET. But when i use this as workflow is not completed yet, it doesn't allow me to change it.
2. How to change the state of document that the workflow is completed.

Regards,

Nitish