JJoS Upgrade & Keyboard into MPC & Mixer in MPC acts funny

Ok I have currently the most current Akai OS on my MPC 1000 ...

but now I want to uprgade to the JJOS but In my internal hardrive in my MPC I have over 400 beats SO I was wondering if I upgrade to the JJOS will I be able to use all my old programs and sequences with my new JJOS OS if i were to do it

and I was wondering is there a way I can hook up a keyboard to my mpc and record whatever it is I am playing the same as I would with my samples over whatever drums i got sequenced...

I heard something that in the JJOS that in track 57 you can record audio

And sometimes when i am in my mixer inside of the OS of the MPC 1000 trying to get my levels right on my drums the levels sometimes drop automatically to zero/their lowest point and it sometimes doesn't want to stay up when I try to bring them back up and they'll also either pan right or left for No goddam reason it gets annoying so when i go in the mixer i try and do it made quick before the mixer gets all buggy

Maybe you guys can help me out with my small dilemas...

Any help comments and suggestions would be Greatly appreciated.

Peace and Blessings

ROCiSM