It's all in the synching - double click the iPod icon in iTunes and find the photos tab. Select the albums you want, unselect the ones you don't, then hit Apply.
Remove the photo from the folder or iPhoto album that you linked to when you set the preference "synchronize photos from" and sync the iPod. For example, if the iPod is getting the pictures from the folder "Pictures," remove or delete them from "Pictures" and sync your iPod.
Here's a simple "How To" on downloading photos from a folder on your hard disk to an iPod:
1 Create a folder on your hard drive to hold the photos you want on your iPod. Call it iPod Photos for example
2 Drag the photos you want from your usual picture folder into the folder you just created
2 Open iTunes, select your iPod in the iTunes Source list.
3 Click the Photos tab and select “Synch photos from.”
4 Choose “Choose Folder” from the pop-up menu and select the iPod photos folder you created.
5 When you want to change what photos are on the iPod just add or remove the photos from the folder you have made and syncronise the the iPod
iTunes will add "optimised", small TV quality versions of the photos to the iPod for you to view. if you want to include full size photos so you can move them from one computer to another check the "Include Full Resolution photos" box. When you want to change the photos on the iPod you simply add or remove the photos you want from your iPod Photos folder and sync the iPod.
If you want to use iPhoto instead:
1 Create an album in iPhoto to hold the photos you want on your iPod. Call it iPod Photos for example
2 Drag the photos you want from the iPhoto library into the folder you just created
2 Open iTunes, select your iPod in the iTunes Source list.
3 Click the Photos tab and select “Synch photos from.”
4 Choose “iPhoto” from the pop-up menu and the Selected albums button, check the iPod photos album you created.
5 When you want to change what photos are on the iPod just add or remove the photos from the album you have made and syncronise the the iPod
