I transposed it down 2 and I play the bottom 3 strings and it sounds great. sounds very similar to the song. strung the "and the science gets done" section and go back to finger picking the C and F

I like to do it with tabs using these chords. It's pretty easy to do it that way: you keep the same chords, and only use the C, E, and A strings. The pattern is CEAECEAE, and I repeat that for each chord until the chorus, where I simply use CEAE. Hope this helps if you would rather use tabs! :D

D Bm (repeat like crazy)
This was a triumph...

Em A
It's hard to overstate my satisfaction

D Bm (repeat like crazy)
Aperture Science...

Em A
For the good of all of us

BbM7
Except the ones who are dead

F C Bb F
But there's no sense crying over every mistake

F C Bb F
You just keep on trying till you run out of cake

petites corrections :
Gm C F Dm
And the science gets done and you make a neat gun

Bb A D Bm (repeat some more)
For the people who are still alive