Removing pkg receipts in 10.6

I have a few payload free packages that are used simply to run a post-flight script. For example, joining a Mac to Active Directory with the "dsconfigad" command, or simply uninstalling software with the "rm" command. In cases like this I usually also delete the pkg receipt. For 10.4 and 10.5 it was simple. I setup this variable PackageName=$( /usr/bin/basename "$PackagePath" ) Then I run this to remove the receipt. ########## RemovePackageReceipt () { rm -rv "${TargetVolume}/Library/Receipts/${PackageName}" } RemovePackageReceipt ########## The thing I run into with 10.6 is a kind of chicken and the egg problem. The receipts do not show up in /private/var/db/receipts until the installer is finished. So the rm command in the post-flight script has nothing to delete. I have some ideas for using the pkgutil command, but it too has nothing to delete. So I end up with two questions. Does anyone have any suggestions for removing the receipt for 10.6? What is everyone's general philosophy about removing a package receipt?