Further to Monday's news that four more dates had been added to Roger Waters 2010 North American Wall tour (for Chicago, Philadelphia, Los Angeles and Anaheim), and in light of some emails we had asking for help, we thought it would be useful to remind you of the ticketing presale timetable for these concerts, as they fall outside the timetable used for the previously announced performances.

With the various presales, it can be quite confusing as there are a number of different ones available for each of the shows, and we want as many of you as possible to be able to secure your tickets. Amex Cardholders and RogerWaters.com presales at Ticketmaster.com have now started, but below we show you the other options open to you for each show.

While we're on the subject of the tour, don't forget to grab your free digital tour poster through this link!

September 23rd: United Center, Chicago:

ROGERWATERS.COM PRESALE: Now running; check your inbox for "winning" email
AMERICAN EXPRESS PRESALE: Now running through Ticketmaster.com
VIP PACKAGE PRESALE STARTS: 10am CDT, May 13th
ITUNES PRESALE STARTS: 10am CDT, May 13th
RADIO PRESALE STARTS: 10am CDT, May 14th
LIVE NATION PRESALE STARTS: 10am CDT, May 14th
PUBLIC ONSALE STARTS: 10am CDT, May 17th
VIP PACKAGE ONSALE STARTS: 10am CDT, May 17th

November 11th: Wachovia Center, Philadelphia:

AMERICAN EXPRESS PRESALE: Now running through Comcasttix.com
VIP PACKAGE PRESALE STARTS: 10am EDT, May 13th
LIVE NATION PRESALE STARTS: 10am EDT, May 13th
RADIO PRESALE STARTS: 10am EDT, May 13th
AOL PRESALE STARTS: 10am EDT, May 13th
PUBLIC ONSALE STARTS: 10am EDT, May 14th
VIP PACKAGE ONSALE STARTS: 10am EDT, May 14th

November 30th: Staples Center, Los Angeles:

ROGERWATERS.COM PRESALE: Now running; check your inbox for "winning" email
AMERICAN EXPRESS PRESALE: Now running through Ticketmaster.com
VIP PACKAGE PRESALE STARTS: 10am PDT, May 13th
ITUNES PRESALE STARTS: 10am PDT, May 13th
LIVE NATION PRESALE STARTS: 10am PDT, May 14th
RADIO PRESALE STARTS: 10am PDT, May 14th
PUBLIC ONSALE STARTS: 10am PDT, May 17th
VIP PACKAGE ONSALE STARTS: 10am PDT, May 17th

December 14th: Honda Center, Anaheim:

ROGERWATERS.COM PRESALE: Now running; check your inbox for "winning" email
AMERICAN EXPRESS PRESALE: Now running through Ticketmaster.com
ITUNES PRESALE STARTS: 10am PDT, May 13th
VIP PASS ONSALE STARTS: 10am PDT, May 13th
LIVE NATION PRESALE STARTS: 10am PDT, May 14th
RADIO PRESALE STARTS: 10am PDT, May 14th
PUBLIC ONSALE STARTS: 10am PDT, May 17th
VIP PACKAGE ONSALE STARTS: 10am PDT, May 17th

The presale information above is taken from the promoter's website (LiveNation.com) although in some cases there are minor differences to what is shown on Ticketmaster.com, which is where the tickets are being sold through (apart from the extra Philly show which is through comcasttix.com). Please check these sites for the up-to-date position in case things change since we wrote the above!

We've put the details into date order, which we hope helps make sense of the many options available to you! Please remember to help us keep Brain Damage up and running by using our links wherever possible to Ticketmaster.com.