Are there any guides for workflow management and customization?

Joseph,

Refer the PTC Customization guide.

http://support.ptc.com/WCMS/files/165581/en/10_2_M030_WindchillCustomizationGuide.pdf

There is great information in the Customizers guide, but I would start here:

http://support.ptc.com/cs/help/windchill_hc/wc102_hc/index.jspx?id=WFAdminAbout&action=show

There are several examples of configuring your Workflows including a section on Workflow code examples.

Additionally one can find load files for some examples here:

[WT_HOME]\loadFiles\WorkflowExportImport