replace topic icon for preview topic image

[thespirit]

Hello
I just installes my first vB forum and this weekend i will migrate the database from my phpbb forum to the vB forum and set up the site.

To get all things together before i start i have 2 questions.

1. Is there a option or a mod to change the topic incon in front of a topic in a previeuw image of the image file that comes in the topic like this: http://www.coverplazaforum.com/viewforum.php?f=2

This is on my phpbb forum and i did this by uploading the 120x69p images to the topic icon folder, how does this works on vB?
Do i need to do something simular or do i need a mod and is a mod like that around here?

2. What is the best Anti Spam/ Catcha mod around here for vB?


Thanks for anyone who can help a new vB user with his first steps