I can't test this code anymore as I do not have VS 2003 installed so I cannot edit the current version of the documents module, I can only work with the new one.
In the EditDocs.ascx control, in the page_load event there is the following IF statement
' If the page is being requested the first time, determine if an
' document itemId value is specified, and if so populate page
' contents with the document details
If Not Common.Utilities.Null.IsNull(ItemID) Then
You will need to add something like
If UserInfo.IsInRole("Administrators") Then
cmdDelete.Enabled = True
Else
cmdDelete.Enabled = False
Ensure that your admin role is aministrators, you will then need to re-build the module to make the changes complete.