dont know. PM FireIce for further details?

Eye-contact, let her know your presence
Once both eyes of you and her meet, Smile. Naturally.
if she smiles in return, thats a good sign, but that doesnt mean shes interested or whatsoever. She might just be friendly. But at least she knows your presence (1-5% in her memory.... slowly accumulate ok?)
Well after that you dont have to talk to her. Depends on you. Fast or slow. Since you meet her most of the time, well just let her know your presence more for the next 2 days and then strike up conversation. Let her feel much comfortable and not talk to her the first time she meets you (depends on what types of girl)
Also notice her and her friends around her (if there are), how she communicates with her friends and such. Probably can tell what kind of personality she has.... outgoin or?) If outgoin then good
it's a crush only

she must be pretty
good luck