Text Box in Excel for noddy users!

I've created a 'form' in Excel (not using the form controls though) - and
protected the sheet so that only certain cells can be edited. However, I
have to create some areas for comments which need to behave like text boxes -
I tried merging cells but users seemed to mess up when completing the forms
so I thought I'd use a text box instead. I know how to protect the sheet and
leave the text box unprotected but the problem is that I don't want users to
be able to move or resize the text box. Any ideas gratefully received.
Thanks
Anita
PS - v2003