Arduino Software on Wiring Hardware?

Hello. I’m trying to use the MsTimer2 library on a Wiring project, but it don’t works.

Wiring don’t have any library to attach an interrupt to a internal timer, so I have to put an external oscilator or maybe purchase an Arduino Mega…

My question is: Arduino software works with several different boards, and several different ATmegas… Why not include the Wiring board in the list?