Hiding the Fileds in the Activity/Oppurtunity transaction.

Hi Guys,

We are using the Activity & Oppurtunity Transaction.

We basicalyy copied the SAP stnadard Transactions and defiend new codes.

Now I want to hide some of the fields/Tabs in the transaction.

Where Can I do that.

I tried TCode SHd0 but the documentation states that it should be done only by the experieced people and so I dont wanna try it.

Is there other way where I can hide some of the fields