Pre-iPhone 4S owners that like to jailbreak can add Siri to their combo smartphone and iPod thanks to a new tool called Spire from chpwn. The hack apparently works around copyright concerns by letting users install the Siri files from Apple’s own servers instead of copying them from an iPhone 4S.

While Spire may side step some copyright issues, it doesn’t necessarily make it easy to keep Siri running on your jailbroken iPhone.

Spire hacks Siri onto older iPhones

“Spire is not a complete solution. Apple still requires authorization to use Siri, so information from an iPhone 4S is still required,” chpwn said on his blog. “To insert this information, Spire allows you to enter your own proxy server address.”

The trick to keeping Siri running on a jailbroken iPhone is to set up a proxy server, and then to connect an iPhone 4S to it on a regular basis since the needed authentication keys change often.

Spire isn’t a perfect solution for hackers wanting to try Siri on an older iPhone, but at least it’s easier than previous methods. For now, however, this looks like an option for more tech savvy iPhone owners.

Spire is available as a free download through the Cedia app only on jailbroken iPhones.