I don't know much about the whle guitar set up thing, but from what you've said, it sounds like the neck is bowng downwards slightly.
Sounds similar to what my brother's guitar is like.
If you don't know exactly what you're doing, I would take it to a tech, as you could really **** up a guitar if you're not sure. I wouldn't feel confident about it.
Plus getting it set up might improve the playability overall and you'd get a beautiful new instrument back.
I may be completely wrong though, but maybe more people will read it by me posting and they can help you out.
So I'll try not to breathe as I hold my head still,
the light bends on my face, there'd be tears if I cried
And I'll try not to think what the happy things were
I just think of the stuff that just made me **** scared
Elita's Rev Online
Vox Valvetone - £45 posted or trade for Voodoo Labs Sparkle Drive
Digitech Digidelay (+cash) - trade for Boss DD-20