If your friend has not already tried the Canadian Genealogy Centre - Canadian National Archives to order his file, he should go to
Canadian Forces after 1918 (including Second World War) - Military - What to Search: Topics - Canadian Genealogy Centre - Library and Archives Canada The site give all the information for how to order his records. It also has some links to other places to look for Canadian records. It would help, but not necesary, if your friend had his Dad's service number(s).
I finally got my Dad's records both for the Artillery WW II and RCAF 1946 to 1960. To see what I would get I ordered the genealogy package. It is pretty basic. I will probably do and Access To Infomation Privacy request as I want deeper detail such as his medical records. Hope this helps.
Michelle