http://www.adobe.com/products/creativesuite/design/Wendell, sorry if I gave the wrong link. This may be the extended version as well. Hopefully, it will take you directly to the download. I have to say the download and install were a little difficult, but I think everyone on here are smart enough to figure it out.
Understand about the erase, but I never had an issue with it. I would give Indy's a shot, but there really is no better editing tool out there than Photoshop. And, I still may be able to get a hold of Scott who helped me. Googling Photoshop and transparent signatures should get you all you need for help. And, there is always the guy who will do it for free.
The nice thing about the transparent signature is it never gets questioned. The one big mistake I made is to write my signature more like what it should look like rather than my scribble I usually use.