Hazza - can't help you with the tech question, but have a look at this for advice on things to do:

http://thespanishbiker.wordpress.com/

also here:

http://www.adventurebikerider.com/fo...-pyrenees.html

I guess what I am saying is not to speed off into France too quickly, but to take a few days exploring the mountains. You'll find info on both these links about a campsite for bikers about half way across on the Spanish side - see:

http://www.anzanigo.com/inicio.html

Emilio is a bit odd, but knows the area and biking like the back of his hand, the food is good, there is a pool, he has all the local routes mapped out (just ask to see stuff from behind the bar - or if you have no spanish, you can point), its quite cheap, and bikes!

Also, as you head on into France - another stop off point must be:

http://ridersrest.eu/default.aspx

Hope that helps.
Pat