Trying to clear 5,000+ texts inbox/sent

[slackerstatus]

I've had my HTC touch(vogue?) for some time through alltel. Not many complaints with it. Recently I started just letting my sms rack up and now its finally time to delete it. I tried hitting "tools" and "clear text messages" but all it did was delete maybe like 400 from inbox and 200 from sent.

Is there any program that you can use through your PC to delete texts? Or maybe any other way to clear my inbox and sent?

thanks