A few urgent questions

[T-B0N3]

The thing is ... I have ...3 big problems ... which need to be sorted and I am in your hands right now.
1st... I have this guestbook http://www.e21114.monline.dk/guestbook/pbguestbook.php
the first thing I would like is to center the form on the black background so that it will not tile/repeat again.
2nd ... when you post a message the following code interferes

echo("Your message has been added, click <a href='?option=view'>here</a> to return."); 

This and some other messages appear echoed in black ... and on my black background ... well ... they just are invisible. Anyway to fix this ?
3rd. and most ugly thing
I have this gallery
http://www.e21114.monline.dk/two/
How can I make this gallery smaller ... like ... half size of what it is now?

Am I asking for too much ? In case anybody needs I can send you guys the actual files so you can see how they are structured.
Thank you all for taking the time to read and reply.

[T-B0N3]

I did a mistake as well.. should have posted under php ... I ask kindly one of the moderators to move the topic...