I've seen that and never gave it a second thought as it was added to the SendTo items.
I read this again and it seems you are new to the SENDTO feature. Here's a tutorial on that.
I don't have the XP machine handy but if the shell:sendto fails, try just sendto.
Recently I tried to copy a file and when the copy window came up listing the files I could copy to I noticed the folder "My Network Places". I have never seen this icon or folder listed before. I right clicked my desktop and went to desktop then to customize desktop and the box for "My Network Places" was unchecked.
Why would it all of a sudden appear? Should I scan my computer? Any help would be appreciated.