Oh I'm sorry.
array_walk doesn't return the new array.
Do
array_walk($sphinx_groups2, "intvalArray");
$cl->SetGroups2 ( $sphinx_groups2 );
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Also at the moment rewriting sphinx.php for 0.9.7-RC1.
In sphinx.conf just minimal changes were necessary, sphinx.php quite some changes. Currently recreating indices so I can start playing
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Running 0.9.7-RC1. Minimal changes to sphinx.conf, a huge change to sphinx.php and it's running

Will upload upgrade howto and full howto later! Going to the gym now, need to get strong! "Strong Mind, Strong Body"!?