Kawai Synthesizers

Hi,

I'm new to the group and new to editing and downloading to a K4 and 
will apolagize in advance for my lack of knowledge.  If anyone can 
answer a few of my questions it would be a great help.

I have recently been using a midi interface (midisport) to edit 
presets on my Bass Vamp Pro with its editing software and was 
wondering if it's as easy to edit presets on the K4?

I have downloaded two K4 editors, K4win and the MidiQuest demo.

Will these tools be enough to do some editing in the K4?

Can I save the edits?

How do you get sysex files from the computer to the K4?

Are the memory cartridges for the K4 still available?

Is it possilbe to get a Hammond (hope that's not a bad word) sound 
out of the K4?

These are probably fairly basic questions for you veterans out there 
but a mystery to me.

I'm impressed with the K4's sound, I bought it for my daughter to 
practice piano on but have since thought I could encorporate it into 
some the songs I'm playing with my band.

Thanks so much for any help you can provide.

Cheers,
Lew