In your inc_footer.asp file find and replace the chunk of code aroun dline 50 with the following, editing to add your own details where required:
Response.Write " </tr>" & vbNewLine & _
" </td>" & vbNewLine & _
"</table>" & vbNewLine
Response.Write "<p>" & vbNewLine & _
"<table width=""95%"" align=""center"" border=""0"" bgcolor=""" & strForumCellColor & """ cellpadding=""0"" cellspacing=""1"">" & vbNewLine & _
" <tr>" & vbNewLine & _
" <td>" & vbNewLine & _
" <table border=""0"" width=""100%"" align=""center"" cellpadding=""4"" cellspacing=""0"">" & vbNewLine & _
" <tr>" & vbNewLine & _
" <td bgcolor=""" & strForumCellColor & """ align=""left"" valign=""top"" nowrap><font face=""" & strDefaultFontFace & """ size=""" & strFooterFontSize & """ color=""" & strForumFontColor & """><a href=""http://www.<your site address"" title=""Home Page"">Your site name</a> <a href=""contact.asp"" title=""Contact us"">Contact us</a> <a href=""/donate.htm"" title=""Make a Donation"">Donations</a></font></td>" & vbNewLine & _
" <td bgcolor=""" & strForumCellColor & """ align=""right"" valign=""top"" nowrap><font face=""" & strDefaultFontFace & """ size=""" & strFooterFontSize & """ color=""" & strForumFontColor & """>© " & strCopyright & "</font></td>" & vbNewLine & _
" <td bgcolor=""" & strForumCellColor & """ width=""10"" nowrap><a href=""#top""" & dWStatus("Go To Top Of Page...") & " tabindex=""-1"">" & getCurrentIcon(strIconGoUp,"Go To Top Of Page","align=""right""") & "</a></td>" & vbNewLine & _
" </tr>" & vbNewLine & _
" </table>" & vbNewLine & _
" </td>" & vbNewLine & _
" </tr>" & vbNewLine & _
"</table>" & vbNewLine
Then create a html page called donate.htm and place it in the root of your website and within it place the following table, again adding you paypal details:
Doing it this way makes it easier to build a page giving more details as to why you need donations, etc, and keeps it in the style of your website rather than having a simple link direct to a Paypal donation page which hardly gives any info.