To change which module gets invoked to provide a genric service, such as an ethernet card or SCSI host adapter module, you need to delete the old one and add a new one. To delete a module, select it by clicking on it, then clik on ``Delete''. Then click on ``Add'' to add the new module, as explained in the following section.
If you have changed your SCSI controller (scsihostadapter), remember to make a new initial ramdisk with the /sbin/mkinitrd command as documented in section 5.2.2.