How to force Squid not to Store Certain HTTP Objects

[atit jariwala]

I am using Squid 2.5 STable2 on Redhat Linux.
I want squid not to store(forcefully) certain Objects downloaded via
Internet. This Objects might or might not contains NO-CACHE headers. But
when it comes to Squid, I want Squid simply serves that to associated
Client. and then not Store it in Disk & also Purge it immediately from
Memory. How can i Do it. ?
Waiting for Reply,
--- Atit Jariwala