If anyone is looking for the Yamasoft gif conversion utility :
Although Yamasoft's website is long gone, the code can be found on the following websites :
http://www.fpdf.org/phorum/read.php?f=1&i=9418&t=7568#9418
http://www.fpdf.org/download/php-gif.zip
http://phpthumb.sourceforge.net/index.php?source=phpthumb.gif.php