[TYPO3-dev] Help with cache_md5params

[Steve Webster]

OK, after e-mailing with Stanislas I'd like to try and use the 
cache_md5params table that comes with the core rather than create a new 
table for the same purpose.

My mod has a clean up utility where it will delete old hash values 
greater than x days old.

How can I achieve this using cache_md5params as I don't want to delete 
other potentially valid records.  I'm guessing I can use the "type" 
field but does anyone have any idea what value to use?  I can see that 
the core uses type=2.

Thanks,

Steve