ClearCase: customize associatiions operation - tool

I dislike some (to be honest, many of) standard ClearCase tools, for example, xml-files compare tool and file-merge tool. Even more, I already have my lovely tools for everything. The deal is - how to make ClearCase use my custom soft instead of the bundled tools?

And the answer is: there is a special ClearCase file which maps file extension, source control function and the tool to execute this function. Map-file can be found here:

INSTALLED_CLEARCASE_DIR/lib/mgr/map

On my Windows dev PC the path is C:\Program Files\Rational\ClearCase\lib\mgrs\map.