For what it's worth, there was a Ticketmaster presale for the 2006 Dublin show which required a password - in this particular instance, the password was one of the more obscure album tracks on HAND (Wildflower). To this day I have no idea how this was circulated, for it certainly wasn't sent out on any mailing list I was a member of (though I wasn't and still am not a Backstage member). In fact, someone on this board told me the password, and he told me that he got lucky through guessing!

So, on the assumption that the LH tour presale requires an actual password (ie not some unique code), my naive suggestion would be to try out album titles on Ticketmaster tomorrow.