[Answered] Noob PS3 Firmware Bypass Question
To answer, there is no way to bypass the Firmware 'forced' updates with the exception of installing an Infectus Mod on PS3 consoles (under 2.20 I believe) and then backing up your flash, updating, and then downgrading to your own older fw flash via Infectus when you wish.
If your PS3 is a 1.00/1.10 then you may wish to consider this option before you update your Firmware.
Finally, you are correct... the Resistance exploit no longer works (for quite some time Sony plugged that hole). However, it should also be noted that currently no retail PS3 holes have been found allowing unsigned code to run, etc meaning there really isn't a strong reason (aside from personal preference, and hope that one will surface) to not update to the latest PS3 Firmware.