Ceri
For what its worth, and Im not advocating these as absoloutes(!) I took aged garlic extract, green tea extract ( because of encouraging tests carried out at UCLA with GT and BCG; green tea extract was shown to increase the efficacy of BCG over, I think, a four year period). I also took a good quality multivitamin (the Penny Brohn Cancer Care site will send you a special pack that includes all the vits and minerals they think people with cancer need; these are tried and tested over the years by them and are pricey but very high quality).
www.pennybrohncancercare.org/
The most important thing that I did was to improve my lifestyle and dietary habits; less meat, no smoking, no alcohol, plenty of fresh organic fruit and veg, avoid additives, eat fish etc.
Whether or not the above is going to help with Steve's diagnosis I cannot in all honesty say. But I do know that I felt bloody great when I was doing all this and thats pretty important when you're dealing with all this. Plus, your body is taking such a battering you need to get fortified! As I said above, it's only when I came off al the BCG I realised what it was doing to me.
All the very best
Tim