Cloey,
Yes.
Just open CuteSoft_Client\CuteChat\Advertising\TopAds.ascx and modify it. Right now it contains the following simple code:
<%@ Control Language="c#" %>
<img src="images/cutechat_banner.gif" border="0" alt="" />
You can delete it and add your Flash Banner.
asp.net Chat http://cutesoft.net/ASP.NET+Chat/default.aspx
Web Messenger: http://cutesoft.net/Web-Messenger/default.aspx
asp.net wysiwyg editor: http://cutesoft.net/ASP.NET+WYSIWYG+Editor/default.aspx
asp wysiwyg html editor: http://cutesoft.net/ASP
asp.net Image Gallery: http://cutesoft.net/ASP.NET+Image+Gallery/default.aspx
Live Support: http://cutesoft.net/live-support/default.aspx