Well, if you are making your signatures as transparent, then you are ahead of 90% of those on here. It took me a while until I bought photoshop.
I am a little confused about PDFs, because you can always open a PDF in its native application as Ben says. There are hundreds of 3rd party Adobe applications. I just use Adobe Acrobat 9.0. Expensive, but it does everything.
I still like the Leslie method for PDFs and importing.
