Rangers went ahead in the 41st minute with a deflected opener from Heidar Helguson before the striker netted his second goal of the afternoon in the 60th minute and captain Adel Taarabt wrapped up the points with a late penalty.
"It was difficult early on and we couldn't quite get on the ball but we get better as the game went on," said the Rangers boss, who celebrates a year in charge next week.
"We got a break with the first goal because it took a deflection but we've those go against us at times so we won't complain. And we still worked hard for it.
"The second goal was fabulous, the whole move was fabulous. In fact we played some good stuff today and it is a bonus when you do that.
"I've been delighted with the determination the team have shown and their willingness to put their bodies on the line when they have too. At times there has been a real northern grit in this southern team."
Source: PA
Source: PA