Hi kbranden,
You can set property "ProgressPicture" to your own image to replace the progress bar image.
<CuteWebUI:UploadAttachments runat="server" ID="Uploader1" ProgressPicture"~/my.gif">
</CuteWebUI:UploadAttachments>
About the second question, can you send me a screenshot to show which green checkmark you want to hide?
Regards,
Ken