I have and it is the default until i reboot my phone..it's still the default but when i go into my messages after the reboot it asks which i want to make the default as..this only happens when i reboot...when the phone is on handscent is the defaultyou haven't set it to default. there should be a little checkbox asking if you want to set it as the default browser. hit that checkbox then handcent and you're good
I had trouble with the pop up default question sticking when I selected it. So I did it from within each app. From the settings inside the default messenger shut off notifications and clear the defaults.
Then go into Handcent and do the opposite, setting the default. Once I did that, it worked great.