Where can I find this text?

I would change the following text, but can not find it.
I am looking for the words:
1) Press "2" to start (titlescreen)
2) Grab the Wii Remote, etc. .. and press "2" button (just after the initial warnings)

Ps. Nothing founded in message.arc

I did some searching, and believe I've found what you were looking for:

1. Splashscreen #1:
   - wii strap warning
   
   
2. Splashscreen #2:
   -"Hold the Wii Remote sideways" warning (at 6808 in message.arc).
   
   
3. Titlescreen:
   - Open Wiiscrubber and extract US/PAL --> Layout --> openingTitle --> openingTitle.arc
   - Open openingTitle.arc with SZSModifier.
   - Notice it contains three folders. Expand blyt, and click openingTitle_US.00.bryt
   - In the hex, you should see "p.r.e.s.s. .t.o. . s.t.a.r.t" & the Nintendo copyright.

Hope this helps. Let me know if it did or not!

Perfect!! Thank you!!

No problem, hope it helped. If you have questions about anything, don't hesitate to ask!