Questions for Advanced Guestbook

Hi
I have a questions about Advanced Guestbook
first of all I like this script a lot it is the most nice guestbook I found around on the net.

Well my questions are:
I just changed web hosting for my website a couple days ago. With my old hosting I had Advanced Guestbook with this new one not. There is another kind that I dont like too much. I would like to have AG again.

1) Can I download it here and installed on my site?
2) I will do not have trouble with the other guestbook?
3) Can someone help me with some steps what I have to do for installed it?

Thanks for your help
Wildblue