Can I import (with CBjuice) a list of the riders with the direction of the images into CB? If so where do i put the images and how must i fill the csv with the rigth direction?

The only want to import users is through CB Juice as for transferring over images from image fields or avatars I believe once you do the import you'll have to copy/paste the images over from images/comprofiler to your new site. I do not know if it'll move the images for you; likely not.

I don't want all off the riders to become an actual memeber in joomla. How can i prevent this?

Delete them from the import file I suppose. Believe CB Juice outputs CSV files.

I want to import this file with only the filled in fields (no usernames, no passwords)

If no username is provided then name will be attempted to be used for Username. If no name is provided then email will be attempted as username. If that fails your users won't create. Passwords if left empty will auto-generate.

I want to upload all the images (under avatars) to the server so CB can use them with the right name (where do i place the images)

Images are stored in images/comprofiler folder, but they are stored with userid. You'd need to update each users with the correct userid after you import the users back into CB. You'd also need to ensure the avatar/image fields match this new value.