Good to hear another Airplane fan and guitar player.
Jorma was good at intentionally using odd, discordant notes in his playing, sometime unintentional!
. This opening lead part is a good example of that. It's not clear what part you're referring to that you can't figure out. You say you figured out the first half. I assume the part you're having trouble with is where he starts to bend the note and does his slap technique?
That slap technique btw became one of Jorma's trademark licks he would use. I heard somewhere he got it from playing clawhammer banjo in his folkie days and adapted it to guitar.
Anyway, maybe you could point out from going to the video link below where you're having trouble; like he begins bending the note at around 0.27 in the vid: http://www.youtube.com/watch?v=E9CVLVevm4E
His lead only lasts from 0.20-0.35!