• Go to your Account Info and login.
• Under Member Information choose Edit
• Under General Preferences Click on the Language and Content link.
• Choose Chinese-China (Mainland)
• Click the ÎO½OÊÜ button (its the one on the left)
• Go to Edit Profile and click on the link next to your Yahoo ID ([±à¼*])
• Next go to the top link in the center that looks like this: ±à¼*¸öÈ˵µ°¸
• Then enter in your symbol enhanced nickname in the second field labeled ÄسÆ
• Check the box at the bottom of the page next to ³ÉԱĿ¼ and then click the bottom button
• Your Nickname is now set, next we need to get back to English again.
• Go back to your Account Info and login again if prompted
• In the field labeled Óû§ÐÅÏ¢ hit the Edit button and at the bottom of the page next to ÓïÑÔ¼°ÄÚÈÝ£º click the link
• Change your setting back to English - US or UK or whichever region applies to you. (Canada doesn't offer Nicknames, so choose U.S.)
• Hit the button at the bottom labeled Íê³É (on the left) and Accept the TOS agreement.
• Click the Finished button on the Top or Bottom of the page and proceed to Yahoo! Chat with your brand new "enhanced" nickname.

KOREAN CODE!!!!!!

¡¡ (space na mahaba)
¦¡ (-)
¡æ (->)
¡ç (<-)
¡ê (<->)
¡è (up arrow)
¡é (down arrow)
¢Ð (left wing)
¢Ñ (right wing)
¢½ (heart shallow)
¢¾ (heart)
¢À (club)
¢¼ (spade)
¢Æ (clover)
¢â (TM)
¥ë (lambda)
¥Ò (epsilon)
¦ (o phi na maikling I)
¾ (o phi na mahabang I)
§Ù (omega)
¡Ü (bola)
¢Á (bola na may tuldok sa gitna)
¡Ú (star)
¢Ó (†)
¢Ô (‡)
¢Æ (fuzzy box)
¢Ü (music note)
¡Î (female symbol)
¡Ï (male symbol)
¥÷ (pitchfork)
¡å (triangle na baliktad)
¢´ (triangle)

A
¬Õ (weird A)
¡Ó (a na astig)
¥ë (A)
¥á (cute a)
B
¬Ó (b na maliit)
¥â (B)
C
¥æ (C na astig)
D
¨¢ (Ð)
©¢ (d na meron design)
E
¥å (E na backward 3)
¥î (E na backward 3 na malaki)
F
G
H
§ (h na maliit)
I
¢® (¡)
¥é (i na maliit)
¢Ô (weird I)
J
K
† (k na astig)
¥ê (k na maliit)
L
¬¤ (upsidedown L)
§¤ (l na astig)
M
¬Þ (m na maliit)
N
¬Ú (inverted N)
» (Backwards N)
¥ç (weird lowercase n)
O
¥õ (o na kakaiba)
¢Ä (O leftside shaded) (i'm not sure about this one)
¢Å (O right shaded) (or this one)
P
¥ñ (p na maliit)
Q
R
– (baliktad na are na maliit)
S
¢± (§)
T
Š (t na maliit)
U
¥ì (u like inverted h)
V
W
¥ø (w na maliit)
X
Y
¥ã (y na maliit)
¥é (y na maliit)
¬¹ (weird Y)
Ž (y na maliit na may design)
Z
Š (z na maliit
¢À - club
¢Á - circle with dot in the middle
¡Ú - star
¢Æ - makes a fuzzy box
¢¾ - makes a heart
¢Ü - Music note, it doesn't really look like one to me though.. lol
¢Ä - O leftside shaded (i'm not sure about this one)
¢Å - O right shaded (or this one)
¢± - makes and S with a dot in the middle (doesn't really look like an S to me)
¢¼ - spade
§¤ - a weird L that people always think is a lowercase E
¥÷ - pitchfork
¬Õ - weird A
¥ø - W
¦ - o with a line down it
¬¤ - upsidedown L
» - Backwards N
¢Ô - weird I
¡ç - left pointing arrow
¡è - up arrow
¥å - small backwards 3 kinda E
¥ç - weird lowercase n
¡é - down arrow
¡æ - right pointing arrow
¬¹ - weird Y
¡Î - i'm not sure what this is, but I think it's a male symbol
– - small backward r
¥æ - S
¢Ó - T
¥â - big letter B
¥á - small commic sans A
¡ê - left and right pointing arrow
¢â - TM
¡Ó -
¬Á - big backward R
¥ä - small letter d
¥ì - small worming w
¥î - big E
¥Ò - weird E
¥Ä - triangle A
¨¤¬ - H
Õ¬ - weired O
¡æ - big W