I've got a kit-based wheatbeer in primary at the moment:
1 can of coopers wheat (brewmaster? series)
1KG of liquid wheat malt extract
300g of wheat malt
200g of pale malt.
25g of hallertau hersbucker pellets
I just mashed the pale and wheat malt for 90 minutes in a thermos, drained it into a big saucepan, sparged with a thermos full of water. Boiled that with the liquid wheat malt extract. Once I had hot break, I added 15g of the hops, boiled them for 1/2 hr, then added the 10g left over and boiled for another 10 minutes. Turned off the heat, added the can, dumped all that in the fermenter. Topped up with cold water to 19L and pitched 500ml starter of WY3068.
I personally havent had good results with the safwheat. The beers turned out fine, just not a wheat beer by style though. I like my wheatbeers bavarian/german style, ie with banana/clove notes.
I've done a beer before pretty much identical to the beer above, except I used 2KG of liquid wheat extract, and an overall volume of 23L. It turned out bloody tasty.