I'm using the C# version but the VB would not differ greatly. You dont need to add another button, just locate the photoes.aspx page under the Admin folder, right-click and select view code, locate the Button1_Click event handler. in c# it looks like this:
protected void Button1_Click(object sender, ImageClickEventArgs e) {
DirectoryInfo d = new DirectoryInfo(Server.MapPath("~/Upload"));
foreach (FileInfo f in d.GetFiles("*.jpg")) {
byte[] buffer = new byte[f.OpenRead().Length];
f.OpenRead().Read(buffer, 0, (int)f.OpenRead().Length);
PhotoManager.AddPhoto(Convert.ToInt32(Request.QueryString["AlbumID"]), f.Name, buffer);
// Place to delete the image file
f.Delete();
}
GridView1.DataBind();
}and of course you must have appropriate permissions to delete the file from the server.