Can the NEX 8000 skip to the radio presets or Sirus XM presets with the steering wheel up/down buttons instead of skipping to the next station?  As of right now when I press the up or down button, the stations change from 102.5 to 102.6 etc.  I would like to be able to switch to my next preset instead of the next station.

I use the idatalink maestro sw remote interface. This allows you to assign two functions to your steering wheel buttons. the first function is press and release immediately, the second is is press and hold for 3 seconds. The whole thing is programmable via maestro's website. Comes with a usb cable.

I have assigned the immediate press for my presets and press and hold for station seek. Works like a charm. Picked it up on eBay for $60. You can also assign other buttons on your steering wheel for things like answer a call, activate Siri etc. Let me know if you have anymore questions.

press and hold the arrow up or down for a second or two to go through the presets

It depends on how whoever programmed the steering wheel module. It has to be programmed in a specific order.

on mine if i press the up and down arrows quickly it acts like the seek botton, if i press and old for a second it will scroll through the presets