did u try using the on dialog event? for example:
Code:
on *:dialog:addon:dclick:9:{
  if (<check for the clicked text>) { run iexplore.exe <url1> }
  elseif (<another check for the clicked text>) { run iexplore.exe <url2> }
  <and so on...>
}

the problem is i don't know your aliases and yur mdx version. if u want u can send them to hackg@data.bg and i`ll see what i can do 4 u;)