you can use the cascading property of CSS without hacking:

e.g.:
[code:1]
<table width="100%" border="0" cellspacing="0" cellpadding="0" id="cbUserTable">
...
<tr class="sectiontableentry1" style="cursor:hand;cursor:«»pointer;" id="cbU0">
...
<tr class="sectiontableentry2" style="cursor:hand;cursor:«»pointer;" id="cbU1">

[/code:1]
can be styled specifically for CB users-lists as follows for example:
[code:1]
table#cbUserTable tr. sectiontableentry1 {
background: solid red;
}
table#cbUserTable tr. sectiontableentry2 {
background: solid blue;
}
[/code:1]

This can be done in site template or in your cb template.

radio wrote:

Thanx I managed to do it the way i was trying, Your way is probably a better way but im not sure how to use the code for my purpose and exactly where to put it

You should put it in your template.css file.
This way next time you upgrade CB your changes will not be lost.