This tool is OK to add to your tool chest but IMHO you are better off getting full address for iterates, etc. using hcihl7test.
As for PATHCOPY of the entire field, if you address just the field with no modifiers it should copy the entire field.
For example:
PATHCOPY 0(0)OBX.#5 -> 0(0)OBX.#5
should copy all iterations
But
PATHCOPY 0(0)OBX.#5(0) -> 0(0)OBX(0).#5 will only copt the first iteration
If you want to get rid of the iterationas altogether use an iterate as Jim said and append each iteration to OBX(0).#5. Or, you could use a simple pre-xlate tcl proc in the route and just remove the iteration characters from the field or replace them with blanks using a string map command. Either method should be a relatively simple operation