This is what the developer have to say about system requirements:
RANT XL runs on computers using Windows ME, XP or Vista, with 64 Mbyte RAM, 16-bit colour and screen resolutions of 800 x 600 pixels or more. For enhanced visuals 1 GByte of RAM and minimum 1024x768 pixels resolution are required.*
I see no reason why it should not work on a standard spec'ed netbook.