enlarge spy thumbnails

How can I enlarge spy thumbnails? I have tried editing the spy css but the thumbnails then disappear.

thanks,

Dan

Or can I make them into a grid instead of a list format to fill up the page if I want to use them in the middle of the page rather than in a side column?

I have edited the spy css to the following, adding float: left and width: 170px:

#spy_events {
    position:relative;
}

table.fixed_menu table.popup div.spy_events_wrapper {
float: left;
  overflow: hidden;
    width: 170px;
}

div.spy_events_wrapper {
float: left;
    position:relative;
    white-space:normal;
     width: 170px;
}

div.spy_events_wrapper:first-child {
    margin-top: 0px;
}

div.spy_events_wrapper:last-child {
    margin-bottom: 10px;
}

div.spy_events_wrapper_not_member {
    height:auto;
    padding-bottom:2px;
    padding-top:2px;
}

div.spy_events_wrapper_member_menu_action {
    text-align: center;
    font-weight: bold;
}

div.spy_events_wrapper div.thumb_wrapper{
    position:absolute;
    left:0;
    top:0;
}

div.spy_events_wrapper div.event_info{
    min-height: 32px;
    padding-left: 50px;
}

It put the spy events into a grid format but they are no longer in the spy box, they are outside the spy box and partially covered up by the next box. How can I correct this?

Dan