Main Riff: this is pretty much the whole song. 
Gb|———————————————————————————————:
Db|———————————————————————————————:
Ab|————————3—3—3—3—5—5—5—5—3—3—3—3:
Eb|3—3—3—3————————————————————————:
 
Guitar Solo: during the guitar solo you move up half a step
Gb|———————————————————————————————:
Db|———————————————————————————————:
Ab|————————4—4—4—4—6—6—6—6—4—4—4—4:
Eb|4—4—4—4————————————————————————:

Outro: after the guitar solo play this riff and fade out
Gb|———————————————————————————————:
Db|———————————————————————————————:
Ab|————————3—3—3—3—5—5—5—5—3—3—1—1:
Eb|3—3—3—3————————————————————————: 

This is a good song. play all the notes in steady sets of quarter 
notes and your rythm should be fine. the tuning like on most Weezer 
songs is half a step lower but you can play it using standard tuning 
and it sounds just as good. listen to the song to get the order 
and have fun.