I reckon the Coopers Lager kits are about the best out there. With a few hops, they make a very decent attempt at a commercial-style lager.
They have quite a good hop flavour for a canned kit, but the addition of the hops do hit the spot, and you can be quite enthusiastic. I've been using Saaz to good effect, but your Halletauer should be great too...
This is my M.O... Fill the can with boiling water to dissolve the extract left after emptying the can into the fv. Put two can fulls in a pan, add 10-15g hops and boil for 15 minutes or so. Remove from heat and add 15-20g as the pan cools. Leave for 20-30 mins before straining into the fv through a sterilised sieve. If the hops are very fresh use less, if old use more. The basic idea was DaaB's, and once you have a taste for how many hops you need to add, it works very well.
AFAIK, the yeast supplied by Coopers is Safale, I usually use the supplied yeast and it seems to work okay. I did read on the Aussie forum that it was a mix of Safale and Saflager for the Lager Kits, but I would have thought that was unlikely.
I think anywhere between 50% and 75% Light Spraymalt is fine. Using 100% Spraymalt makes a good beer, but it's not like commercial lagers - too heavy on the palate.
Carbonate as much as you dare, I add 1 tsp sugar per pint to 2 litre PET bottles, but they need refridgerating before opening.
Edited for spelling...
