op_man

Specify operand representation manually.
(for the explanations of 'ea' and 'n' please see @hlpIdcop_bin[op_bin]())
     str - a string representation of the operand
IDA will not check the specified operand, it will simply display
it instead of the original representation of the operand.

success op_man(long ea, long n, string str);// manually enter n-th operand