In Explorer do the usual Shift+Right-Click Open With and use some other application?
I have Windows XP Pro and in trying to get my scanned documents to open in Wordpad, I made the wrong decision in following this advice from (ahem) another forum:
"You can have what you want by changing your method a bit. Open My Computer to the folder, and rightclick any file to use 'open with' for Wordpad. You could even choose the "Always use this..' option of open with to set .html as a wordpad default for editing."
Okay, aside from my stupidity in choosing the "Always use this" option, now all the docs that I didn't personally format in RTF are opening up to show the symbols below: