I need to parse two completely different XML data files in the same view controller, so I would like to know if it is possible to change the name of NSXMLPaser delegate meth
No you can't. And there is no need to do that.
Simply differenciante the parsers by checking the first parameter of delegate methods.
For example :
-(void)parserDidEndDocument:(NSXMLParser *)parser;
The concerned parser is always passed as the first argument.
Another solution is to give the two parsers different delegates, so you always know which parser is concerned.