Default [Q] can I downgrade from ICS TO 1.08.415.4 WITH S-OFF PHONE?

HI
I was wondering if i could downgrade my s-offed sensation xl from ICS to 1.08.415.4??????
thanks
همه آدمها با هم برابرن اما خدا آدمارو به اندازه تلاششون دوس داره