Data Guard - chapter 2 - Failover & roles

Question

Okay, with some help from everyone here I have my test boxes in a primary & physical standby setup and everything is running fine.
My next step was to do a test of failover which was the entire reason for this. If we lose the primary due to a hardware failure, we start up the standby as the new primary...then when the old primary is on its feet, make it the new standby....
...and once again I'm confused.
After going through the failover section of the docs: http://download-east.oracle.com/docs/cd/B19306_01/server.102/b14239/role_management.htm#i1026491 I have the new primary up and running. But now the questions.
1) The new primary was originally created with a "standby" control file, what exactly is that doing then and is it a problem for the primary to be running on a 'standby' created ctl file?
2) To recreate what will be the new standby, it points me to the instructions on how to originally create a standby database. Problem is, this is on an old primary with the Oracle service already created and configured. Should I alter the service to manual? (assume the hardware problem was corrected without destroying the disk drives so I still have an older copy of the database on there that is at the state it was in when everything failed) Is it just that simple plus the other standby enabling commands or do I need to make more edits to system files?
3) Copying over the database. In section 3 it has you making a backup of the primary and then copying it over to the standby...but it never explains the restore process. So what I did was just copy the physical database files. Is this the right way and should this be what happens when recreating a new standby or should I be using the backup and how?
4) When attempting to mount the old primary in standby mode it complained about it not being a standby control file, okay I'll make one from the new primary, but this leads me back to my 1st question.

Answer 1

Thank you..
I'm able to get into the DB using BEQ conection:
1* select name,db_unique_name,open_mode,database_role from v$database
SQL>
SQL> /
NAME DB_UNIQUE_NAME OPEN_MODE DATABASE_ROLE
DNATTEST DNATRECO MOUNTED PHYSICAL STANDBY
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
however, cannot login using TNS.. Is this expcted..??
oracle# sqlplus system@dnatreco
SQL*Plus: Release 10.2.0.3.0 - Production on Wed May 21 10:44:29 2008
Copyright (c) 1982, 2006, Oracle. All Rights Reserved.
Enter password:
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress