Quote:
if i have been idle more than 30 mins, it would type in mirc backgroud the command /away auto-away after 30 minutes


not tested but might work
Code:
on 1:INPUT:*:{ .timerAW 1 1800 away auto-away after 30 minutes }


Quote:
and type jsut /away on any keypresses

no need for that
ALT+o -> options -> cancel away on keypress

Go ahead, jump. 100,000 lemmings can't be wrong.