Web Automation Tick Box In Nested Tables

My situation so far i have a rather large program in vba that accesses a site (confidential info im afriad will post snippets though) logs in navigates through a rabbit warren of pages using different types div's form's a href's etc and finally get to one page before where i need to extract information from!!

This webpage has one large table then nested tables within for each entry.

For example

PHP Code:

<table><tr><td><table>info....</table></tr></td><tr><td><table>info....
</table></tr></td><tr><td><table>info....</table></tr></td></table> 

I need to find a way to search the data cells within the nested tables find a specific displayed value then if required tick the checkbox (which has dynamically generated id's names etc) in that row then move on to the next table and do the same.

All I need to do is establish that one row has the data value i need and tick the check box that correlates (which is in the same row).

PHP Code:

<table border="0" cellpadding="0" cellspacing="0"> 
<tr class="altline"> <td> <table> <tr>  <td class="col_time" title="16/04/2013">18:30</td>                      
<td class="col_duration">00:51</td>   <td class="col_placetype"></td>     

[Code] ...........