Help:CVS tree installation
To simplify the update process you can just use the default cvs dir tree. Adjust the include path like this (in LocalSettings.php):
$IP = "/your/path/to/this/dir"; ini_set( "include_path", "$IP/extensions/wikihiero:$IP/PHPTAL-NP-0.7.0/libs:$IP/includes:$IP/languages:" . ini_get("include_path") );
If you want to enable PHPTal skins (monobook), add
$wgUsePHPTal = true;
Note: If you don't have a fresh checkout, make sure you have the subdirs templates, PHPTal and the subdirs in the style dir by calling cvs -z3 up -dP (or by copying the dirs).