Sharpkris: Woodcutters do work, so it must be something on your end. To start with: which mod version, which tileset, what are they doing, and what have you done before? And did you try genning a new world, embark with a woodcutter and test if he works there?
EDIT: I feel very, very silly atm. I tried and tried to add this invader skill boost... and just cant figure out how to make a button that cycles though 0-15, while displaying 0-15 and searching for 0]YESBOOST to 15]YESBOOST, and always adds +1.... I then deleted everything, made a textbox, just enter the number you like... but that ended up replacing all numbers in the file, instead of just the ones in the natural skills... omg. Its probably something someone who actually knows VB could do in 5 minutes. ^^
I will just add a button. +5 skill or nothing. Simple boolean, ON/OFF. At least I know that I can manage that ^^
EDIT2: Mh. I had a good look at the noble tokens. I could force people to use legionnaires for the military. REJECTED_CREATURE:CASTE... I would add a militia captian, with maybe... maximum ONE of them per fort, and with only two militia members maximum, and all other military leaders need to be legionnaires. Which you could join in a building. So either you have a super crappy little militia of 3 guys, or you build this building and join the glorious dwarven army.
Otherwise I couldnt really find a use for nobles, besides an optional harder setting. All citizens require a bed, when you have 50 citizens they upgrade, all need a bed, chest and cabinet and get one demand.*
*Fulfilling the demand gives the noble a happy thought. If a demand goes without being fulfilled, the noble will be "angered at the state of demands" and receive an unhappy thought, but no dwarves will be punished. Eventually, an announcement will be made that the noble has simply "forgotten" the demand.That would make keeping dwarves happy a lot more difficult. People have to make a real bedroom for each, no more dorms... and of curse no one keeps one demand per dwarf, which gets insanely high... which means people ignore them... which means probably half of them dont get fullfilled... which means your dwarves get bad thoughts.
Which of course leads to easier tantrum spirals.
Edit again: Actually... I could do a pretty nifty "harder nobles" button. Manager, Bookkeeper, Military Leaders, Chief Medical Dwarf, Psychiatrist... they all would require a workshop first. For example you have to build a Scriptorium first, get a couple of ingredients like paper, ink, a quill and such, to make a bookkeeper. And get a hospital workshop will all kinds of tools before you can appoint the chief med dwarf... or you have to buy a certain tradegood, lets say a "military license" from the mountainhomes, before you can make military commanders.