Column width issues when exporting to Excel using ASP.NET

[Chase Kang #52]

So I'm using the typical export code to render the contents on my web
form to HTML and into an Excel spreadsheet. My web form consists of
about 5 tables of varying dimensions (from approx. 3x4 to 6x8).
Ideally, I would like my spreadsheet to look exactly like how my web
form is laid out. My main problem is that the cell widths of each
table are not independent of each other on the spreadsheet, and causes
my spreadsheet to look warped and distorted. For example, the width of
column A on the spreadsheet becomes equal to the size of the widest
first column from all the tables. Has anyone had to tacke a similar
problem as mine, and if so, what'd you do to alleviate it?

Here's what my web form is set up (and how I'd like my spreadsheet to
look):
------------------------------------------------------
| [Table 1] [Table 3] |
| |
| [Table 2] [Table 4] |
| |
| [Table 5] |
------------------------------------------------------
Here's the code I'm using:
' Clear response content before adding to web form.
Response.Clear()
Response.Buffer = True

' Set the content type to Excel.
Response.ContentType = "application/vnd.ms-excel"
' Remove the charset from the Content-Type header.
Response.Charset = ""
' Turn off the view state.
Me.EnableViewState = False

Dim tw As New System.IO.StringWriter
Dim hw As New System.Web.UI.HtmlTextWriter(tw)

' Get the HTML for all controls on the page.
Me.RenderControl(hw)

' Write the HTML back to the browser.
Response.Write(tw.ToString())

' End the response.
Response.End()

I really don't want to resort to using XML to generate my spreadsheet
since that'd take me a good while to figure out, and I can't purchase
any COTS products to do all this for me since I don't want to do a
server-side install of Office. Any suggestions appreciated. Thanks.