Here are some additional links to get going with your PlusD:
http://www.ramsoft.bbk.org/tech.html - Ramsofts technical document on the PlusD
http://www.alchemist-software.org.uk/ - Alchemist Software's library of PD disk images
http://simonowen.com/sam/samdisk/ - SamDisk, a mighty fine utility to copy disk images to a real PlusD floppy and back again
http://home.wanadoo.nl/edwin.blink/samc ... anager.htm - Blinky's SAM Disk Image Manager is useful for examining disk images
Don't worry about the SAM references. The disk format is identical.