Set PSI to the level on the door face sticker, which is likely around 28/29. This will reduce, but not eliminate the squeely problem. As too the stickiness question, I assume you are saying they are not sticky enough? This is obviously a compromise tire, selected for a combination of performance and wear. If you let at least five (5) pounds out of them, you will get a better contact patch, and probably better road adhesion. For really sticky tires, with the coresponding shorter mileage life, do a search and touch base with the AX crowd here. They will be able to recommend several models that work well.
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2008 SLY GXP Auto with all of the goodies
3" Magnaflow CATBack Exhaust
K&N Drop In
Little Chromies, Kappashield, Evolution Cover
MRZ Billet Caps Under The Hood (Pure Bling!)
Short Antenna
ProClip iPhone System
Silverstar Headlamps