1st SQL query - Am I doing it correctly?

[93Corvette]

Have a question concerning SQL queries.

Being the 1st time I do this I don't want to mess anything up:

Example: Suppose the settings I want all of my users to be like this:
(UCP>Edit Option>Date & Time Options
Automatically detect DST setting = N
Is DST currently in effect = Y

I have already allowed my SQL query search to work.
(ACP>Maintenance>Execute SQL query>Manual Query)
So do I just type in the following command in the Manual Query block?
Off: UPDATE user SET options=options - 64 WHERE options & 64
On: UPDATE user SET options=options + 128 WHERE NOT(options & 128)

1. Do I type both of these in the same manual block?
2. Do I use the On: and Off: command or are they just saying that what it does?
3. Anything I should do before hand? i.e which files should I back up?
4. God this freaks me out!!!

Here is the thread that I think shows me the commands:
http://www.vbulletin.com/forum/showp...89&postcount=1

Thanks is advance!!!