As stated above, it should be a plug-n-play module. But if you happen to call Level-10, please tell us what they've got to say.
I'm interested in it for nothing more than increased line pressure (firmer shifts.) I don't use the slap-stick much (mines an 03,) but having increased line pressure with crisper shifts in full automatic mode would be nice.
I received an email from them, weeks ago. It's not available for the p5.
Here's the official reply:
"Dear Enthusiast,
Right now there is no Shiftronic for that car, but there is a Torque Converter upgrade for $498 + u ship us your existing Torque Converter. This process takes about 2-3 days buisness to complete and can be shipped next day air if there is a rush.