how to burst a PDF document into single pages (etc.)

This command line shows, how to get the output files named your way:

$ pdftk … burst output 'page.%02d.pdf'

Split Select Pages from Multiple PDFs into a New Document:

$ pdftk A=one.pdf B=two.pdf cat A1-7 B1-5 A8 output combined.pdf

Select a single page into a new document:

$ pdftk A=one.pdf cat A130 output one.p130.pdf

Please find more information (like examples, man page, …) on pdftk here!