What kind of "Photo CD" do you want?
AFAIK not possible with NeroSDK
VCD/SVCD with Photo Slideshow:
Use NeroVideoItem with ItemType = NERO_JPEG_ITEM for every single photo. Store this NeroVideoItem objects in NeroVideoItems and use this as parameter for BurnVideoCD method of NeroDrive.
Data CD with photos as normal image files:
like any other data cd
I can't provide any code sample, because I use the C Interface and not NeroCOM.