Unique problem with 2 PS3

I have the following problem. I have 2 PS3 one hacked and one normal I haven't used both for about a year. I have forgotten which custom firmware I have used. I want to give the normal one to a friend and keep the custom one. But I have download games on the normal one. So I googled if I can somehow back them up and it seems its not possible. So I guess I have go online with the custom one and redownload the games, but then I have to use a spoof. Now I dont know which spoof I have to use because I have forgotten what custom fw I used and I probably need to update the old custom firmware anyway.

Is there a way to find out what cfw is installed? Is there maybe a possibility to transfer the dl games that I havent found? Do you guys have any suggestion on what I should do?