Day 1- Back, Traps, Abs
Day 2- Quads, Delts, Calves
Day 3- off
Day 4- Chest, Hamstrings, Abs
Day 5- Biceps, Triceps, Calves
Day 6- off
Day 7- off

I can try this, but can I still do the treadmill on the days I'm already at the gym?

And what do you mean that I can't just go from everyday training down to 4 or 5? I actually took today off. So would it be bad if I started my 'Day 1' tomorrow?

"After every dark night, there's a bright day right after that. No matter how hard it gets, stick your chest out, keep your head up, and handle it." -Tupac Shakur