I'm using Libra Office (basically a more up to date version of open office) on my XP machine at work and you can do some basic PDF editing in Draw.
Why not download it and try it out?
It's basically the same thing, but Oracle are not much liked by the open source community, to put it mildly, hence the appearance of LibreOffice.Good call - but I thought Libra Office was a completely different package to Open Office?
Doesn't The GIMP also allow editing of PDF's?