Hi Dan,

you have to update the ascx file Login.ascx at \admin\skins\

you will see there one hyperlink control

<asp:hyperlink id="hypLogin" runat="server" cssclass="SkinObject" enableviewstate="False"></asp:hyperlink>

now you have two options either to do that using css setting. or you can have your image button in between the starting tag and end tag of this hyperlink control

<asp:hyperlink id="hypLogin" runat="server" cssclass="SkinObject" enableviewstate="False"><img src="/images/btn_login.gif" border="0"></asp:hyperlink>

same for the other skin object dnnUser but at the file User.ascx which exist at the same folder

try it

 You don't have to change the login.ascx (which would affect all portals in your DNN installation), if you set the Text and LogoffText attributes of the <dnn:LOGIN skin object with HTML instead of pure text:

Text='<img src="logon.gif">' 

If you want to use image files from your skin directory, there's a little trick I learned from Erik van Ballegoij in this thread (thanks again, Erik!), which makes the image path portable:

Text='<%# "<img src=""logon.gif"">" %>'