Region setting on Power DVD

I have a Samsung SD-604 (SD!) DVD drive that according to several websites is region-free - Cite, I’ve borrowed a US film (R1) but Power DVD tells me I have only 4 more region switches before it is locked (or whatever) - How can I prevent it from becoming locked to R2 - I’m likely to borrow other US DVDs’.

Just download DVD Genie and you can keep changing the region.

Thanks, Funkynige
I’ve tried Genie since the OP, in PowerDVD the screen is pink - time appears to pass in the GUI but no image is displayed. :frowning:

Why might this be?