RE: HL Pershing- update on customizing
These images came from the book "Armor in Korea: A Pictorial History" by Jim Mesko (ISBN: 0-89747-150-4). I also recommend the book "M26 Pershing and Variants" by Troy D. Thiel (ISBN: 0-7643-1544). Both have pictures of the Pershing and her variants - T26E3, M26/A1, M45 and M46/A1).
Edit: Another one that looks good from Amazon is "M26/M46 Pershing Tank 1943-53" by Steven Zaloga (ISBN: 1-8417-6202-4)