tune down half step

the whole song goes around a loose progression
something like this

     D (xx0232@1)  D (xx0232@1)  D (xx0232@1)   DE----x----x----x-----x-------------------------| (xx0232@1)B----x----x----x-----x-------------------------|
G----2----2----2-----0-------------------------|
D----0----0----0-----0-------------------------|
A----2----2----2-----2-------------------------|
E----3----3----3-----3-------------------------|


     D (xx0232@1)  D (xx0232@1)  D (xx0232@1)   DE----x----x----x-----x-------------------------| (xx0232@1)B----x----x----x-----x-------------------------|
G----2----2----2-----0-------------------------|
D----0----0----0-----0-------------------------|
A----2----2----2-----2-------------------------|
E----3----3----3-----3-------------------------|


     D (xx0232@1)  D (xx0232@1)  D (xx0232@1)U  DE----x----x----x--x--x-------------------------| (xx0232@1)B---(0)--(0)--(0)(0)-0-------------------------|
G----2----2----2--2--4-------------------------|
D----0----0----0--0--0-------------------------|
A----2----2----2--2--2-------------------------|
E----3----3----3--3--3-------------------------|


     D (xx0232@1)  D (xx0232@1)  D (xx0232@1)U  D (xx0232@1)  D (xx0232@1)  D (xx0232@1)  DE----x----x----x--x--x----x----x----x----------| (xx0232@1)B---(0)--(0)--(0)(0)-0----x----x----x----------|
G----2----2----2--2--4----2----0---(0)---------|
D----0----0----0--0--0----0----0----2----------|
A----2----2----2--2--2----2----2----3----------|
E----3----3----3--3--3----3----3----3----------|


I'm tired of the city
All the street noises
Outside my window flow
Thousands of headcases

Though I am sorry
This way just seems easiest
A house in the country
Is just not within my grasp

I miss my mother
I miss my father too
I miss my grandparents but
There's nothing I can do