Korg Poly800/EX800 Users

Hallo to you all.

I'm new on this group, so I'd like to say hallo to all and thanx for all files and schematics here.

I'd like to ask about something I didn't find In older messages (or didn't find answers):
1.
Is there a chance to add some Hold pedal, or is it unreal(I think,there is no analog ADSR? or is it?)? I'm using hold pedal on my Poly61 and it makes great work, I'm missing it on my Poly800.
2.
Is there a chance to add program UP button/switch/pedal?

I think can I do both mods without hawk800?

thank you, sorry for my english.

ryba (pantvrdej)