Click Start - Programs - Accessories - System Tools - Character Map. This will list all the characters you can put into your hotkeys. Pick the ones you want, click the Cut button. Now go to step 2.
Open your EQ folder, find the <character name and server#>.ini file for your character. Inside the .ini file near the bottom will be all your hotkeys. Paste the ascii characters you cut from step 1 into the spots you want.
Click the File button, then Save As. You will see an encoding line at the bottom of this, make sure it is UTF - 8, then save.
You can also modify this file by windowing EQ during play, but you need to zone after you save it to have the new keys work.