I just did this about 2 weeks ago on a 55 gallon frag tank with the exact same glass holes kit. It was very easy and simple. I drilled 3 holes (I had 1 return kit hole) in about 30 minutes for all 3. Just take it slow and run some water over the glass and you'll be fine. Please post the finished result =). I love seeing new tanks haha.
What is the name of this "glass holes kit." and where did you guys get it from?