and yet.... RC2 is distinctly UNSAFE with some fairly major known issues and bugs. If you have security issues with RC2, the ONLY thing we can say, at this point, is UPGRADE.
At the very least, you should be running RC3, although even that is not really a good choice.
If you upgrade to RC5, mods which install on RC3 should install on RC4, 5 and final... and mods for RC5 will almost definitely install in final with minimal, if any edits.