The thing is, you can't easily just add a Hue/Saturation layer. Especially to a cream colour. Cream doesn't have any particular hue or saturation, you know? So there's nothing for the layer to "grab onto", as it were.
So the trick is to first use a Levels layer to turn the cream into red, then clip a Hue/Sat layer on top of that, choose Reds, and fiddle with the Hue/ Saturation and Lightness sliders all you want.
(Note that I said "choose Reds". You can do it on the Master channel, but the Lightness slider does NOT look nice when you use it. Whereas it is lovely when you choose a colour.)
I'll upload a PSD shortly.