Special character input

Question

Alright, so the characters in question aren't so special - I just need vowels with acute accents ("ú", for instance), and I can't seem to place them.
I've seen similar questions answered many times before. However, the solution provided there, and in the official help page - "hold down the key and scroll to the sides until the desired character appears" - isn't working in my phone for some reason.
My input language is Spanish (just as it should be). The odd thing is that the letters A and E don't suffer from this issue; I can place whichever accent I need. Odder still, I get the full range of special characters in certain applications, such as in the calendar. For SMS, however, all I can use are either the unmodified letter, caps, or use a grave accent ("ù", and there's a greater difference between the two than it appears).
I also can't seem to find the "¿" punctuation mark; it isn't in the symbol list under the "sym" key, and I don't know where else to look for it.
Finally, there is something else I'd like to ask about: Is it possible to reconfigure the keypad so that holding down a letter will first print something other than it's capitalized form? If that was possible, it'd be much easier for me to quickly type (you guessed it) accented letters.
Anyways, thanks for bearing with me if you made it this far. Any help with this issue would be much appreciated.

Answer 1

On the U.S., U.S. Extended, and U.S. International PC keyboards, the option key turns the / character into ÷.
In the System Preferences > Keyboard Preferences > Keyboard Tab > Modifier Keys... you can actually set the option key modifier to No Action. It does what it says and option + / is exactly what you get.