JP1 Remotes

thanks for the help. this is what I'm understanding:
I'll use the learning mode to get values for the ir signals coming from my tuner remote.
I'll upload those to my pc and build an upgrade.
I'll load the upgrade containing the information about the ir signals i need to send back onto the remote.
so ...

you guys are very helpful, and I appreciate that. I just wanna know one more thing, I will try to figure out the rest for myself:
does the upgrade i need involve that eprom to be physically upgraded to a bigger one, or will I just be overwriting info for other remotes?

bought the 8810w but doesn't have code for tuner in manual - can't find online
ofa won't respond to my emails
tried to learn each key manually. after awhile, I can't get it to learn anymore keys.
question 1: is this because I am out of memory?

question 2: will building the jp1 cable enable me to ...