"I'm having trouble with logging in as admin"
Easy when you know how.
At a terminal such as konsole:
>password: (put in your root password)
# (Look as hash in red probably, you are root....)
# cd /to wherever the downloaded packages are...)
# (whatever the instructions say)
> (see, you are back to user)
From user desktop
Press Alt and F2 at the same time
In the box which magically appears type say kdesu dolphin
Bang in your root password, wait, a root dolphin instance is there
kdesu command switches you to running that command as root, after you type in your password.