- How do I boost myself in Runway A for a 22? I mean, which one will give me the best chances for a 22, the one looking down or throwing several grenades up? (I also don't really know how either of them work 
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Looking down forces you to prime the nades for way too long, meaning you can only boost yourself twice that way. That + a boost outside the key hut + maybe a guard boost = only 4 boosts total. (5-7 is a good range for 22).
Looking up strat is simple but requires some knowledge of how to juggle the nades properly. You'll be throwing the nades in groups of 3 and 2. For the 3 nades, the timing is this:
1st nade: Look straight up, prime for maybe half a second (very quick) before throwing.
2nd nade: Immediately after first nade, start priming the second. This one should be thrown after the 1st nade reaches it's apex and starts falling.
3rd nade: Again, start priming immediately. For this nade, you wanna change your angle downwards slightly. (10-20 degrees maybe?). Throw the nade just before the 1st nade explodes (you don't want the 3rd nade to get caught in the explosion).
Now await the (hopefully) 3 boosts and then start working on the next group of 2 nades:
1st nade: Same as before.
2st nade: Same as before, except you wait even longer, until the 1st nade is halfway down.
Note: There's no point in trying for 3 boosts here, because you'll reach the plane before the 3rd nade have a chance to explode.
Check out my video to see it all in action:
http://www.youtube.com/watch?v=pezDoXbZ_Tw- Using 2.2, does it generally take too long to get a 22 when I get good with the strafe lines? (I know this question sounds dumb, but I would rather improve my movement in other level than spend 80 hours going from 23 to 22 this early in my skill)
Not sure what you mean exactly, but 2.2 is definately worth it. It means you need 1 less boost which is a big deal on this level. It's a bit akwards to handle yes, but chances are you'll get 22 faster with it, plus you'll gain 2.2 skills that can be reused on other levels. Also, there's only 1 strafe change on Runway, meaning you can use a rubber band to hold the 2nd controller's analog stick into right strafe. Then before the level starts, you extend the rubber band and hold the stick into left strafe with your thumb. So you start out in left strafe, and when you later need to change to right strafe, you simply let go of the analog stick, and the rubber band will automatically give you right strafe.
Final tip: Try to listen to the music when you enter the plane, and learn what a 22 sounds like. It'll make it alot easier to judge your speed.
