Unfortunately I think ADDSKILL is only for one skill, so you would have to put in ADDSKILL for each skill you wish to raise(I'll test this and confirm it in a bit).
It would look something like this:
	Code:
	TRIGGER_TEXT:Hail:{ 
SAY:Greetings %CHARNAME%, I can Set all your skills too lvl 180 if u wish? [okay] 
} 
TRIGGER_TEXT:okay:{ 
SAY:Gratz Your skills are now all 180 Thx. have fun. %CHARNAME%,! 
ADDSKILL 1 180
ADDSKILL 2 180
ADDSKILL 3 180
ADDSKILL 4 180
ADDSKILL 5 180
ADDSKILL 6 180
ADDSKILL 7 180
} 
END_FILE
 Then just save it as "100896.qst" if you're using notepad to edit it.