Dodge Van Spark Plug Replace/Remove

My 2005 Dodge Grand Caravan Started To Run Rough And Engine Light Came On. Took Van To Autozone For Diagnostics, But No Codes Came Up....

Could You Tell Me Does The Mental Sleeve Protecting The Plug Boot Come Off.i Cant Pull The Boot Off The Spark Plug.if The Sleeve Pull Out...

Im Trying To Change My Spark Plugs But My Wire Boot S On So Tight I Cant Get Enough Leveridge.to Pull Them Out.theres A Metal Sleeve...