it's working fine for me now but i had some problems too.
this is how i did it (it can probably help someone):
i DID NOT install navcore (it was updated recently from tomtom home so i thought it wouldn't matter, and it didn't

)
I have found kargent's instructions a little confusing so i read the AUTOKEY manual in spanish.
After installing AUTOKEY and pressing the Autokey TT 7 button i've noticed that the program did not created the "Pega_AQUI_el_fichero_{meta}_del_mapa" folder inside the folder that opens when you push the button. This is not a problem, you can create it yourself, just give it the exact name above mentioned (without the "").
Then i downloaded the map (iberia too in my case because i'm portuguese

). I pasted the meta key given, in Meta.txt as instructed.
In the map folder there are 2 files you need, their extensions are: *.meta and *.meta.dct (* is the name of the map).
Copy this 2 files, paste them in Pega_AQUI_el_fichero_{meta}_del_mapa folder and then run EjecutaMe.bat. It will ask you for your product key without spaces (You must have an OK message when finished, if not, something is wrong. Read the pdf given to know the errors).
I picked the 2 "new" files in Pega_AQUI_el_fichero_{meta}_del_mapa folder and pasted them in the Map´s folder (overwrite if needed).
Copy the map folder to your SD card root as you would normally do.
Extract all the contents of copySDandrun.rar to the SD root (the link is in the first page), run RunMe.Bat and wait, like the original poster said

. I think this will crack your ttsystem file. (there is already a cracked ttsystem file in the AUTOKEY folder but it didn't worked for me (the readme in that same folder says for you to use it, so don't do it

)
Finished! when RunMe.Bat window closes you can disconnect your device, or remove the card from the card reader and use the map.
ps: i have a TOMTOM ONE v2
i hope this helped
many thanks to kargent for this thread

edit: removed
some engrish errors xD