I use nicklust3.dll and it looks great.
here is de code i use:
Code:
 ON *:JOIN:#:{
  if ($nick == $me) {
    nicklust Mark $window($chan).hwnd nLUST_CallBack  rowselect tooltips balloontips hideempty hottrack dlgframe clientedge


    dll Systeem\dll\nickLUST3.dll AddIcon $chan > $shortfn($mircdirSysteem\icons\op.ico)
    dll Systeem\dll\nickLUST3.dll AddIcon $chan > $shortfn($mircdirSysteem\icons\voice.ico)
    dll Systeem\dll\nickLUST3.dll AddIcon $chan > $shortfn($mircdirSysteem\icons\chat.ico)
    dll Systeem\dll\nickLUST3.dll AddIcon $chan > $shortfn($mircdirSysteem\icons\hop.ico)
    dll Systeem\dll\nickLUST3.dll AddIcon $chan > $shortfn($mircdirSysteem\icons\usr.ico)
    dll Systeem\dll\nickLUST3.dll AddIcon $chan > $shortfn($mircdirSysteem\icons\spr.ico)
    dll Systeem\dll\nickLUST3.dll AddIcon $chan > $shortfn($mircdirSysteem\icons\ownr.ico)
    dll Systeem\dll\nickLUST3.dll SetGroupText $chan 1 >  Chatters
    dll Systeem\dll\nicklust3.dll AddGroup $chan 10 + 2 >  Voice +
    dll Systeem\dll\nicklust3.dll AddGroup $chan 11 @ 1 >  Operator @
    dll Systeem\dll\nicklust3.dll AddGroup $chan 12 & 4 >  Halfop %
    dll Systeem\dll\nicklust3.dll AddGroup $chan 13 - 5 >  User ops
    dll Systeem\dll\nicklust3.dll AddGroup $chan 14 & 6 >  Super ops
    dll Systeem\dll\nicklust3.dll AddGroup $chan 15 . 7 >  Owner
    dll Systeem\dll\nicklust3.dll SetGroupView $chan 1 normal
    dll Systeem\dll\nicklust3.dll SetGroupView $chan 10 normal
    dll Systeem\dll\nicklust3.dll SetGroupView $chan 11 normal
    dll Systeem\dll\nicklust3.dll SetGroupView $chan 12 normal
    dll Systeem\dll\nicklust3.dll SetGroupView $chan 13 normal
    dll Systeem\dll\nicklust3.dll SetGroupView $chan 14 normal
    dll Systeem\dll\nicklust3.dll SetGroupView $chan 15 normal
    dll Systeem\dll\nicklust3.dll SetGroupIcon $chan 1 3
    dll Systeem\dll\nicklust3.dll SetGroupPos $chan 15 start
    dll Systeem\dll\nicklust3.dll SetGroupPos $chan 11 end
    dll Systeem\dll\nicklust3.dll SetGroupPos $chan 12 end
    dll Systeem\dll\nicklust3.dll SetGroupPos $chan 10 end
    dll Systeem\dll\nicklust3.dll SetGroupPos $chan 14 end
    dll Systeem\dll\nicklust3.dll SetGroupPos $chan 13 end
    dll Systeem\dll\nicklust3.dll SetGroupPos $chan 1 end
    dll Systeem\dll\nicklust3.dll SetColor $chan bkg $rgb(244,244,244)
    dll Systeem\dll\nicklust3.dll SetColor $chan text $color(14)
    dll Systeem\dll\nicklust3.dll SetColor $chan tipbkg $rgb(219,219,219)
    dll Systeem\dll\nicklust3.dll SetColor $chan tiptext $color(1)
    dll Systeem\dll\nicklust3.dll SetColor $chan hottext $color(12)
    dll Systeem\dll\nicklust3.dll SetColor $chan divider $color(12) $color(0)
    dll Systeem\dll\nicklust3.dll SetHeaderFontStyle $chan italic
    dll Systeem\dll\nicklust3.dll SetHeaderColor $chan 15 $rgb(147,147,255)
    dll Systeem\dll\nicklust3.dll SetHeaderColor $chan 11 $rgb(255,70,70)
    dll Systeem\dll\nicklust3.dll SetHeaderColor $chan 12 $rgb(170,125,164)
    dll Systeem\dll\nicklust3.dll SetHeaderColor $chan 10 $rgb(78,191,224)
    dll Systeem\dll\nicklust3.dll SetHeaderColor $chan 14 $rgb(41,209,155)
    dll Systeem\dll\nicklust3.dll SetHeaderColor $chan 1 $color(6)
  }
  haltdef
}

alias nicklust { dll $+(",$mircdirSysteem\dll\nickLUST3.dll,") $1- } 
alias nlust_callback {
  if ($1 = tooltip) {
    var %extra
    if ($3 == $me) %extra = (Your name)
    nicklust SetTipTitle $2 1 > Info on $3 %extra
    return Status: $nlist_pnick($remove($nick($2,$3).pnick,$3)) $+ $crlf $+ Idle: $duration($nick($2,$nick($2,$3)).idle) $+ $crlf $+ Notify list: $iif($notify($3),Yes,No) $+ $crlf $+ Address: $iif($address($3,4),$ifmatch,Unknown) $+ $crlf $+ Channels: $_comchans($3,32))
  }
}

alias nlist_pnick {
  if ($1 = @) { return Channel Operator }
  elseif ($1 = .) { return Kamer Owner }
  elseif ($1 = &) { return Protected User}
  elseif ($1 = +) { return Voiced User }
  elseif ($1 = %) { return HalveOpped User  }
  elseif ($1 = -) { return Operator }
  elseif ($1 = $null) { return Normal User }
}
alias _isnotifylist {
  if ($notify($1)) return $2
  return $3
}  
alias _comchans {
  var %tokk = $iif($2,$ifmatch,$chr(32)), %iii = 1, %chh
  while (%iii <= $comchan($1,0)) { 
    %chh = $addtok(%chh,$comchan($1,%iii),%tokk) | inc %iii 
  } 
  return $sorttok(%chh,%tokk) 
}


As you can see in the code i use mirc colors and rgb.
The dll you can get it here: www.unochat.nl/nickLUST3.zip
You can copy the code from here because it is not included.
A screenshot of how it looks with this code is here: screenshot
You have to change the path and name of the icons you want to use else laeve it blanc.
Also the path to nicklust dll has to be changed to where you have the dll.

Hope this is some help you where looking for.

Greetzz