SFilter and button

[groin]

Hi all,
i want use the new button facade skin rectangle for PhanxBuff,Stuf and Bar.

i have a problem with sfilter that use button square mode for spells.

  
frame.icon = frame:CreateTexture("$parentIcon", "BACKGROUND")
frame.icon:SetAllPoints(frame)
frame.icon:SetTexture(spellIcon)
frame.icon:SetTexCoord(0.07, 0.93, 0.07, 0.93)

So it's possible to change this with a rectangle icon of spells?

thanks all.