[TelaFirma]

In your instance, the easiest thing to do would be to upgrade PHP. Actually this is preferable to trying to install the libraries yourself. PHP has GD bundled as part of the distribution. You will need to be running at least PHP 4.3.9 to have "write" support for GIF files.


I know that Plesk 8.2.1 comes with at least PHP 4.3.9 - again, this is something that you might approach your host about if you are not familiar with recompiling PHP or upgrading Plesk...