I think I understand what you're looking for, and if I'm right, then this code should do what you're wanting. Please note that I'm not at home and I don't have mIRC currently available to test this.

Code:
 on *:TEXT:!cast aids*:#:{
  if ($readini($nick $+ .ini,Register,Complete) != Yes) {    Notice $nick Please Register! !Register  }
  elseif ($readini($nick $+ .ini,Pass,Logged) != Yes) {    Notice $nick Login, By PMing $Me with !Login PassYouMade!  }
  elseif ($readini($nick $+ .ini,$nick,money) < 1000) {    /msg $chan $nick does not have enough credits to cast Aids!  }
  else {
    Writeini $nick $+ .ini $nick money $calc($readini($nick $+ .ini,$nick,money) - 1000)
    describe $chan begins to cast AIDS.
    msg $chan $nick has spent 1000 credits to cast 1,44,1AIDS!
    if ($r(1,4) == 1) {      msg $chan AIDs failed to cast.    }
    else {
      .Writeini $3 $+ .ini $3 aids yes
      .timeraids1 1 5 describe $chan has successfully casted AIDS on $3!
      set $+(%,aids,.,$3) $readini($3 $+ .ini,$3,aids)
      while $($+(%,aids,.,$3),2) == yes {
        timeraids2 1 10 msg $chan 1,44,1 $3 has 5 minutes till AIDS will take affect.
        timeraids3 1 70 msg $chan 1,44,1 $3 has 4 minutes remaining till consumed by the AIDS effect.
        timeraids4 1 130 msg $chan 1,44,1 $3 has only 3 minutes remaining.
        timeraids5 1 190 msg $chan 1,44,1 $3 has only 2 minutes left! GASP!
        timeraids6 1 250 msg $chan 1,44,1 $3 has only 1 minute left! Please apply the !cure soon.
        timeraids7 1 310 kick $chan $3 $(|,) msg $chan 1,44,1 $3 HAS DIED OF AIDS!
      }
    }
  }
}
on *:text:!cure*:#:{
  if $readini($nick $+ .ini,$nick,money) < 1000 {
    .msg $chan Sorry $nick $+ , You don't have enough credits to cure Aids!
  }
  else {
    Writeini $nick $+ .ini $nick money $calc($readini($nick $+ .ini,$nick,money) - 1000)
    var %nick = $iif($2,$2,$nick)
    if $readini(%nick $+ .ini,%nick,aids) != yes {
      .msg $chan $nick just wasted 1000 credits to cure someone that doesn't have AIDS
    }
    else {
      .msg $chan $nick just spent 1000 credits to cure %nick of AIDS
      unset $+(%,aids,.,%nick)
      .remini $3 $+ .ini $3 aids
      .timeraids? off
    }
  }
}