You'll have to copy them one by one. Sorry.
The H7600 has much more storage than the 4000, but not enough for all of them. Equally, a 512K card will not be big enough for all of them.A 512k card will just fill the 7600.
Note also, that most, but not all of the 4000 presets will run on the 7600.
I can't tell you exactly how many the 7600 will hold, or which ones will be good. I would suggest you pick the ones that are most important to you.