GH is an excellent choice for your friend. GH is unique in it's ability to cause dramatic changes in body composition - leaness - which is especially difficult for older weight trainers to achieve. At his age, your friend produces 60% less natural growth hormone than a man in his 20's.
Used alone, GH will result in an 8 to 12% change in body comp. at theraputic levels. Use with insulin and steroids will result in increased lean muscle mass as well. Oral steroids will cause a release of insulin growth factors (IGF-1)on the first pass through the liver.
GH is injected subcutaneously, in the abdomen area.
I have found that a 12 week cycle is necessary to really see the desired results. I generally do three 12 week cycles a year, 4.5iu ED for the first month, 6iu the second, and 8 or 9iu the third month, along with light insulin supplementation(exogenous GH causes insulin resistance), and plenty of test.
Large doses are not necessary.......average adult male production is only .5 to 1.5iu a day, so even 4iu is quite a bump.
I am 53, and have used this type cycle for a long time.