The other version has the right progression, just in the wrong key. The song 
actually starts a tone up on A instead of G. The progression is A, E, D, E. Here are the lyrics.

A (x02220@1)    E (022100@1)          D (xx0232@1)       E (022100@1)    A (x02220@1)              E (022100@1)        DLittle (xx0232@1)ditty, 'bout Homer and Marge, Her heart was as big as his stomach was 
Elarge (022100@1)
A (x02220@1)E (022100@1)            D (xx0232@1)       E (022100@1)A (x02220@1)            E (022100@1)            D (xx0232@1)         EOh (022100@1)yeah, they say love goes on long after the grilled cheese sandwich is gone

The rest of the song plays during the credits at a slower tempo

A (x02220@1)        E (022100@1)        D (xx0232@1)       E (022100@1)    A (x02220@1)         E (022100@1)              DThat's (xx0232@1)the story bout Homer and Marge, Two folks I helped out for a nominal

Echarge (022100@1) 
A (x02220@1)              E (022100@1)       D (xx0232@1)              E (022100@1)    A (x02220@1)                EAfter (022100@1)Homer went gay, they patched up their schism But the dude never dealt

D (xx0232@1)       Ewith (022100@1)his alcoholism

A (x02220@1)E (022100@1)       D (xx0232@1)        E (022100@1) A (x02220@1)            EWeird (022100@1)Al saying: Oh Yeah, the credits go on, long after the viewer's

D (xx0232@1)         Einterest (022100@1)is gone
  
A (x02220@1)   E (022100@1)    D (xx0232@1)         E (022100@1)  A (x02220@1)        E (022100@1)        D (xx0232@1)   EWeird (022100@1)Al had fun on this show even if it was just a brief cameo