Download Cache is Full

This has not happened, but I keep thinking about it. Is this possible?

Suppose my client is a win 98 machine, small hardrive, only downloaded the v1.1 framework, not the sdk.

Suppose the application dll's are modified quite a bit for a while such that clients are getting new copies frequently. Is it possible for the download  cache to 'fill up', and, if so, how can I programmatically delete it's contents?

I assume this can only be done with the gacutil.exe, which will not be on  the win 98 machine if only the framework was installed.

Just thinking out loud.....