Restoring colour (removing blue/red/purple/brown tints)

I need to know how I'd be able to take out the blue, red, purple and brownish colour in the following screencaps. I know this question has been asked many times (especially for the blue colour removal) but none of the tutorials I tried turned out the way I wanted to.













Could you guys point me to any tutorials or give me any tips? Thanks :) I use Photoshop CS2 and have messed around with Screening layers and Selective Colour.