Automated delete of Outlook Secure Temp content

We've determined that we get approximately 50 calls per month to our support
desk for the "red X" appearing in place of images in Outlook 2003. In
researching this, we found the solution to delete the contents of the OLK*
directory and this has worked.

In order to avoid the 50 calls per month, we're thinking of automating this
deletion in our login script. We haven't been able to find a better,
"enterprise scale" solution.

I'm wondering if anyone has done something similar to avoid this problem.
If so, have you had any downsides to this approach?

Any and all thoughts/warnings/suggestions would be appreciated!
Thanks!
Michelle