Parallel to a surface, yet facing the player

[Aska49]

I'm horrible with angles, I was wondering if someone could help me out.

[lua]function ENT:SpawnFunction(ply, tr)

//spawn code blah

timer.Simple(.1, function()

local pos = ent:GetPos();
local ppos = ply:GetPos();
local up = ent:GetUp();
local tr = util.QuickTrace((pos + (up * 16)), (up * -64), ent);

local ang = tr.HitNormal:Angle();
ang:RotateAroundAxis(ang:Right(), -90);

ent:SetPos(tr.HitPos);
ent:SetAngles(ang);

end);

return ent;
end[/lua]

This works fine for setting my entity parallel with a surface, on slopes and such, but I also want him oriented to face the player that spawned him. This is where I need some help. I'm not sure how to incorporate this and not fuck up the parallel stuff.

[lua]local faceang = (plypos - entpos):Angle()[/lua]