Code Veronica Rank A

Hey guys, I want to know something. I've read that to get a Rank A
with Code Veronica X you need to finish the game in 4½ hours, not take
any first aid spray, not save, not retry, save steve quickly and give
the medecine to the jailer. I want to know if that's correct. Because
the first aids, save steve and the medecine doesn't give me much grief,
but the 4½ hours, the saves and the retries kind of scare me lol. So
far, the less I've done it is under 6½ hours, I've died once but I
save about 10 times lol.

Help!!!
Toukie