OK, verdict is in. Mates reckon that the brew I did in my above post [Coopers Cerveza, 600g Dex, 200g Maltodextrin & 200g LDME to 22L @ 18-20'C] is "bloody good" and does the job like a Corona. Not a dead ringer in my opinion but easy drinking, low FG, negligible hopping/bitterness makes it quite reminiscent of a Corona. It does have a nice head when first poured and this diminishes to a few millimeters after a while, no big deal in my opinion as the original is a bit similar, athough this may also depend on the glass. Colour is very light, I'd peg it at around 9 to 10 EBC.
If you want to impress some megaswill swilling mates, this is the recipe to try. If you're after a Corona, try this recipe with one of the Whitelabs Mexican lager yeasts and see how you go - I only used the kit yeast to save time and money. Still, it goes down well for what it is and had a good review from everyone who tried it.
Cheers - boingk.