I believe for a GF2 you can use Rivatuners NVStrap tool, without the SQ4, yet I'm not sure.

NVStrap can be found in the Target adapter section under Low System Settings. You'll need to set the Use Pro features settings to 'Force On'.

By the way: I sometimes get Artefacts with the marquee select tool, but that's possibly up to my system, since no one else has made any complaints so far.

Renderizer