I think you'd need
0-59/1 0-23 0-7
to run it every minute, search on google and you can probably find it though...
But you really don't want to run a script every minute, if its your own server you may get away with it, but even a few very small 5 min crons we run on a dedicated server can cause problems.
If you are on a fairly standard shared hoster type thing its unlikely they'll let you run a script every hour, let alone every minute.
The only time I've heard of a 1min cron is for a Planetarion (sp? - big online game) LAN...