Not sure which song that is.. not too sure but it looks like a Capo might be needed to easily reach the chords you need to play.. I'm no "chord master" by any means..

Anyway, in case you didn't know the note after the / is the bass note for that chord. Take a D chord as an example:
||-----|--o--|-----|
||-----|-----|--o--|
||-----|--o--|-----|
||-----|-----|-----|
xx-----|-----|-----|
xx-----|-----|-----|

The D/F# chord would be:
||-----|--o--|-----|
||-----|-----|--o--|
||-----|--o--|-----|
||-----|-----|-----|
||-----|-----|-----|
||-----|--o--|-----|


A chord progression using this chord would be, for example:
| D | D/F# | G | Asus4 | A

Although the Asus4 is only played for a quarter of a beat or something like that..

I don't know how to play the chords you are asking for help on, off the top of my head.. but hopefully the "slashed chord" theory might shed some light on the trouble you are having.