Casio CZ/ VZ/ FZ - Pro Series

Hi, I'm an argentian musician and i bought an CZ 101 last week, it's 
a nice synth and it has a lot of 80's ounds that I can't get in my 
other synths. The Internal Memory  only save data for ½ hour when I 
turn the synth Off, I was reading about this and it is a common 
problem. Please tell me, do I have to change an internal batteries? 
Or is it the memory?
I found up a lot of programs to send and receive patches from my 
computer, but If I want to carry the CZ to a live performance does it 
mean that I got to carry my computer too, and it's a little bit 
complicated. I have also and EPS 16 with a disk drive unit, so I 
could make the bulks dump there, Someone knows how can I start the 
bulk dump from the CZ 101?
The Main problem is that I bought the unit without the Manual. You 
can make me a great favour if you can tell me where I can download a 
sacanned version or a txt version of the manual
Thanks