Get data from more than one table

I'm trying to write my own latest topics script so I can view it on the main page of my site, it works fine (used ASPmaker to do it), but I wanted to add in the username of the person who last posted as well, could someone help me with this as I rubbish at SQL and need help? , here what I've got so far:

<!--#include file="db.asp"-->

<%
LCID = 1033
%>

<%
displayRecs = 10
recRange = 10
%>

<%
' Get table name
tablename = "[tblTopic]"
dbwhere = ""
a_search = ""
b_search = ""
%>

<%
' Load Default Order
DefaultOrder = "Last_entry_date"
DefaultOrderType = "Desc"

' Check for an Order parameter
OrderBy = "Last_entry_date"
If Request.QueryString("order").Count > 0 Then
 OrderBy = "Last_entry_date"
 ' Check if an ASC/DESC toggle is required
 If Session("tblTopic_OB") = OrderBy Then
  If Session("tblTopic_OT") = "ASC" Then
   Session("tblTopic_OT") = "DESC"
  Else
   Session("tblTopic_OT") = "ASC"
  End if
 Else
  Session("tblTopic_OT") = "ASC"
 End If
 Session("tblTopic_OB") = OrderBy
 Session("tblTopic_REC") = 1
Else
 OrderBy = Session("tblTopic_OB")
 if OrderBy = "" then
  OrderBy = DefaultOrder
  Session("tblTopic_OB") = OrderBy
  Session("tblTopic_OT") = DefaultOrderType
 End If
End If

' Check for a START parameter
If Request.QueryString("start").Count > 0 Then
 startRec = Request.QueryString("start")
 Session("tblTopic_REC") = startRec
Else
 startRec = Session("tblTopic_REC")
 if not isnumeric(startRec) or startRec = "" then
  'reset start record counter
  startRec = 1
  Session("tblTopic_REC") = startRec
 End If
End If

' Open Connection to the database
set conn = Server.CreateObject("ADODB.Connection")
conn.Open xDb_Conn_Str

' Build Query
strsql = "select * from [tblTopic]"

If dbwhere <> "" Then
 strsql = strsql & " WHERE " & dbwhere
End If

if OrderBy <> "" then
  strsql = strsql & " ORDER BY [" & OrderBy & "] " & Session("tblTopic_OT")
end if 

'response.write strsql

set rs = Server.CreateObject("ADODB.Recordset")
rs.Open strsql, conn, 1, 2
totalRecs = rs.RecordCount
%>

<BR>
<table border="1" width="771" align="center"  BGcolor="#000000" cellspacing="0" cellpadding="3" background="/images/barfill.gif">
<tr>
<td>
<font color="#FFFFFF"><font size="-1">&nbsp;Subject&nbsp;</font></font>
</td>
<td>
<font color="#FFFFFF"><font size="-1">Last entry date&nbsp;</font></font>
</td>

</tr>

<%
'Avoid starting record > total records
if clng(startRec) > clng(totalRecs) then
 startRec = totalRecs
end if
'Set the last record to display
stopRec = startRec + displayRecs - 1

'Move to first record directly for performance reason
recCount = startRec - 1
if not rs.eof then
 rs.movefirst
 rs.move startRec - 1
end if

recActual = 0
Do While (NOT rs.EOF) AND (recCount < stopRec)
 recCount = recCount + 1
 If Clng(recCount) >= Clng(startRec) Then
  recActual = recActual + 1 %>

<%
 'set row color
 bgcolor="#f7f8ff"
%>

<% 
 ' Display alternate color for rows
 If recCount mod 2 <> 0 Then
  bgcolor="#F5F5F5"
 End If
%>

<%
 x_Topic_ID = rs("Topic_ID")
 x_Forum_ID = rs("Forum_ID")
 x_Poll_ID = rs("Poll_ID")
 x_Moved_ID = rs("Moved_ID")
 x_Subject = rs("Subject")
 x_Start_date = rs("Start_date")
 x_Last_entry_date = rs("Last_entry_date")
 x_No_of_views = rs("No_of_views")
 x_Locked = rs("Locked")
 x_Priority = rs("Priority")
%>

<tr bgcolor="<%= bgcolor %>">
<td><a href="<% If not isnull(rs("Topic_ID")) Then response.write "/forum/forum_posts.asp?TID=" & Server.URLEncode(rs("Topic_ID")) Else response.write "javascript:alert('Invalid Record! Key is null.');" %>"><font size="-1"><% response.write x_Subject %></font></a></td>
<td><font size="-1">
<% response.write x_Last_entry_date %>&nbsp;
</font></td>
</tr>

<%
 end if

 rs.MoveNext
Loop
%>

<TR><TD background="../images/barfill.gif" colspan="3">
<% If stopRec > recCount Then stopRec = recCount %>
 <font color="#FFFFFF"><font size="-1">There are <%= totalRecs %> Forums</font>
</TD></TR>
</table>
</form>

<%
' Close recordset and connection
rs.Close
Set rs = Nothing
conn.Close
Set conn = Nothing %>

to see the code working goto my site, any help would be greatly welcomed

Thanx in advance