I have a photograph of a hydrangea head that I am trying to create to look like the ones in the stationery below. I am using Photoshop 7.0. Does anyone have instructions on how to do this or links to online tutorials? 

I think you're looking to emulate the illustrated etching of the illustrations in your sample, right?
If so, you should check out the Andromeda Filters, which do a decent job of changing photos to faux-etched illustration.
http://www.andromeda.com/info/series3.html
Captured from commoncrawl.org on 18 Apr 2015. original URL