Will Cubase 5.5.3 run on my Mac 10.5.8 64 bit system?

Just switched over to 64 bit. All my programs are 64 bit except Cubase 5. Will it run smoothly on my 64 bit systsem? BTW, I do have Cubase 6 running in 64 bit, but my older albums were started in Cubase 5 and I don’t know if I should open them and finish them on Cubase 6.

C5 runs on up to 10.7 according to this.