Just as BeforeUninstallPayload works etc, i need BeforeInstallPayload.

As say BeforeUninstallPayload gets triggered and the user decides they want to keep the db table and files, then they re-install.

The files and db table would be found causing an error.

So what i need is so if the files or db table is found, we ask the user wether they want to use them (if possible), or remove them (perform a clean install).

If the files or db table are not detected it will just install without hassle.

Cheers.

Edit:
Hrmm a new event request would mean that the plugin is not compatiable with the latest public release... Which is a problem... As this would be 'required' in the next version of the gallery plugin...