Welcome Steve
From the coopers website
Coopers Brew Enhancer 1 contains Dextrose and Maltodextrin while Coopers Brew Enhancer 2 contains
Dextrose, Light Dry Malt and Maltodextrin. They are intended to be used instead of white sugar or
dextrose.
however if you want a higher alc% brew you could add both.
If your kit is the new DIY beer kit the Brew Enhancer is probably their No.1 which as above is mostly dextrose with some maltodextrin. The maltodextrin will give more body and better head retention but will result in a slightly lower alc% than if you used the same quantity of just dextrose.
I'm not sure whats in the latest instructions from coopers but they used to recommend a fermentation temp of 26C. This is rubbish, if you can keep your temps down to something more like 20C you will have a much better tasting brew.
Also the coopers Brew Enhancer No 2 has some dried malt in it. I would recommend giving it a go when you get the ingredients for your next brew. The malt will result in a more flavoursome brew. You can also get just malt extract and it goes on.
Make sure you have a god read of the stickies at the top of the Making Beer forum
http://www.homebrewandbeer.com/forum/viewforum.php?f=2 for lots more tips.
Cheers
Earle