Solid Oak skirt around a bay window

Hi, I have a bay window (radius) and I have solid American white oak skirting which I wish to fit in one piece! Could someone please advise on the best method to use to make this happen. I've read a few things in regards to the cuts 2" apart and the steam method. I'm just scared that the steam will change the colour of the oak. Please help and advise if anyone can on the best solution...