[QUOTE=richk]i.e am I better trying sticking to trying to make it work with one finger, as later on in my development this will be an essential part of playing that I will have to master?QUOTE]

Nah... just for now, use the partial fingering they gave you and go back every now and again to the full version. Bar chords are one of those things that have to be worked up to, especially if you're playing an acoustic. They seem impossible right now but if you keep at it, a year from now you'll have forgotten you had a problem with them in the first place.