DX4WIN already allows you to save that information. If you go into "contest" mode and set the "Text to add to QSO" note to "$$" it will put the radio freq. into the "Notes for this QSO" field.
73 - Jim AD1C -- Jim Reisert AD1C, 7 Charlemont Court, North Chelmsford, MA 01863 USA +978-251-9933, <[EMAIL PROTECTED]>, http://www.ad1c.com PGP Fingerprint: D8E2 3D78 339F A7F1 8C13 1193 B5D1 4FB6 79D1 70DC