So if you turn right go through the terminal down an escalator up an escalator you get to the Flounge and Concorde room and Spa and then if you go up one more escalator you get to the J lounge... right? South that is...
I have only done this via Transit from T3.
After the bus from T3 and up the escalators to security;
1) Go through security/x-ray, turn right.
2) Walk about 50-60m (past a few shops) and you'll see escalators, go UP.
3) When you get to the top of the escalators, turn right 90 degrees, then; you can either turn left (Emerald) or right (Sapphire) lounges.
4) CCR, l have no idea.
I was only in the South Lounge 10 minutes, l was in the North for ~30-40 minutes having a few beers at 8am.
I don't know about the 5B Lounge.
If you need to transit from 5A to either 5B or 5C, takes about 10-15 minutes, depending on train arrival. The terminal train comes every 5 or 10 minutes and takes about 2 minutes to 5B and another minute to 5C. I departed from 5C. When you get out of the terminal train at 5C, there is an elevator and escalators. BA also had priority boarding and it was enforced. I was even refused, but after l saw l was a QF WP, l was allowed and the BA FA apologised. I said, 'No problem, it's early'.
There are signs
everywhere, so it's very easy to find your way around. I would say that it's about as easy as SIN. Very easy to navigate 5A.
If in doubt, ask someone, l'm sure they will help you out.