Help! extract picture from a multi-page pdf/ps file

[ahha0ahha]

My system: fedora 7
I have many pictures in multi-page pdf/ps files.
I need to use some of them into my slide.
I know transfer file between pdf and ps by using pdf2ps,ps2pdf,
and I can transfer a single page picture by using ps2eps.

My problem:
How to transfer a multi-page pdf/ps file which is unknown page into many one page pdf/ps file by the command or script?

Maybe use gs and xpr

Any help?

[ahha0ahha]

My problem done.
After searching my installed tools,
I find pdftk
Just single command,
[user@localhost ~]$ pdftk in.pdf burst
very simple,