~ Console commands:
player.setav heavyarmor 1
player.setav lightarmor X
Sets skill without messing with level gains. The skill name can be found from the skill list, and X equals the value you want that skill to be. This also works for health, stamina, magicka, and carryweight. Example: [player.setav marksman 50] sets your archery to 50.
As far as perks go, I don't know if removing the skill levels will remove the perks.
Source(s):
http://elderscrolls.wikia.com/wiki/Console_Commands_(Skyrim)
Source http://answers.yahoo.com/question/index?qid=20111113154526AAft8vR
