Current opcode definition table (taken from AnimED's source comments):
{0} - end of string, end of table entry, end of item
{1} - is an "Enter" byte
{2} - marks text string as skipable by player. Used together with {3}
{3} - is an "Wait for player's click" byte
{12} - marks text string as unskipable by player (sometimes game freezes >_<). Used together with {3}
{14} - displays new text window
{4 & 5}- text color opcode, full size equals to 4 bytes (5:x:x)+#0 (#0 is ignored during decompilation, but must be regenerated
{13} - is a voice file identifier
{11} - is a choise branch
{16} - appends new string to previous (16:x) }
P.S. See my previous message up there.