vauxhall vectra gls 2.0l s reg in need of some bits and bobs done???

i recently tried to change the dipped headlights on my vauxhall and gave up rather quickly due to the fact those buggers are a nightmare to get into with a normal set of hands,never mind a big set!!!!is there an easy way of doing this or will i have to break my fingers top do it????also..........lately the car has been revving quite high when i stop sometimes its normal at about 1000revs then it will shoot up to 1750-2000 revs and stick there and sometimes when i stop it cuts out and the engine management light comes on,but you turn it off then fire it up straight away and its gone??????please help me??