1. Open HRDLOG.net
2. Login
3. Press "Create the script" (menu on the right)
4. Select "View inside IFRAME"
5. Modify the parameters in the 1st box only if it is necessary
6. Copy the code in the 3rd box
7. Open www.qrz.com
8. Login
9. Press the button "Manage" on the top menu
10. Edit your profile
11. Edit your biography
12. Press the button "Source code"
13. Paste the code copied in step 5. Please read the "NOTE 1" below
14. Press the button "Source code" (don't forget this step)
15. Press the button "Save"

NOTE 1: From July 2015 QRZ.com's pages have been converted to HTTPS protocol.
All links to HRDLOG.net must be converted
from http://www.hrdlog.net to https://www.hrdlog.net

Source: http://www.hrdlog.net/docs/LogQrz.aspx