Migrating from BIG-IP 2000 to rSeries 2600.

For the upgrade task, please check this https://community.f5.com/t5/technical-forum/f5-big-ip-upgrade/m-p/314788#M268303 you will find some useful articles links, it will help you,

For the migration task, I hope someone helps you but do not worry, the F5 community i the best place you can get support and useful information