Title: Spaceboy
Artist: Smashing Pumpkins
Album: Siamese Dream
Tuning: E A D G

Begining is the Guitar intro(Do not come in on the guitar intro!)

Bass comes in when Billy sings "Spaceboy I've missed you":

Riff 1
G|-----------------------------------------------------------|
D|-----------------------------------------------------------|
A|-----------------------------------------------------------|
E|3--3--3-3-3--3-3-3--5--5--5-5-5--5-5-5-0--0--0-0-0--0-0-0--|

Riff 1 continued
G|------------------------------------|
D|------------------------------------|  
A|3--3--3-3-3--3-3-3---------5-5-5----|
E|-------------------3--3--3-------0--|

After You finish Riff 1 the bass is out
Play Riff 2 when billy sings "Please i wanna go home.."

Riff 2
G|-------------------------|
D|-------------------------|
A|3-3-3-----2---3-3-3---2--|
E|------3-------------3----|

This is the best part of the song in my opinion. Its the Instrumental Part

Riff 3 
G|----------------------------------------------------------------------|
D|----------------------------------------------------------------------|
A|----------------------------------------------------------------------|
E|1--1-1--0--0-0---1--1-1--3--3-3---1--1-1--0--0-0---1--1-1--3--3-3--3--|

And just read straight through this part. This Riff would be the chorus 
line.

Riff 4
G|-----------------------------------------------|
D|------2--5--------------------------------5-7--|
A|3--5--------------------------3-5-7-9----------|
E|------------3--3--3-3---5--7-------------------|

Riff 4 contiuned.
G|------------------------------------------------|
D|------------------------------------------------|
A|3--2-----2-----------5--5--5--------------------|
E|------5-----3--3--3-----------0--0-0--1-1--1-1--|

Riff 4...still going
G|---------------------|
D|---------------------|
A|3--2-----2--------5--|
E|------5-----3--3-----|

Riff 4............this would be the last Riff(of Riff 4)
G|---------------------------------------|
D|---------------------------------------|
A|---------------------------------------| 
E|1--1--1-1--1--1--1-1--3--3--3-3--3--2--|

And End on an F(2nd Fret on E string)