CM 03/04 was my first proper manager experience and I did about three seasons over 18 months (the loading speed was awful)
I did 15 seasons on FM05 with a few other saves around 3 seasons.
I'm not sure if I used a patch for FM05 but I managed to get Beckham to the 2014 world cup at the ripe age of 38 and I had Danish left back and an Austrian DM/CM with amazing technical stats but physically looked worse than me.
I had no idea how to work the training and they all gradually got worse.
I'd love to go back to FM 05 with what I learnt playing FM08 in which I had one save span