As we all know, 2.4 changed how walljumping works, you no longer stick to the walls as much, and tend to slide off.
In order to stick to a wall in 2.4, you have to ask yourself two questions. "Can I stand or walk in that spot normally?" and "Can I land on it?". If the answer to both are "yes", then you will be able to stick to the wall.
Using this method, I found a new (not really?) path to the IF mountains.
Start here.
http://img259.imageshack.us/img259/4025/14478967et3.jpg
Run (no jumping here) to this spot.
http://img259.imageshack.us/img259/6830/57381242hk6.jpg
Run to the base of the side of the mountain, and try to determine which spots are safe. Take these 4 jumps.
http://img86.imageshack.us/img86/1185/59721502qr2.jpg
Mount up and run.
http://img248.imageshack.us/img248/5170/30240037ga1.jpg
And you're at a familiar sight.
http://img259.imageshack.us/img259/227/11070760nb0.jpg
http://img248.imageshack.us/img248/1826/28237562ya5.jpg