Go to the makeover Mage just north-west of Rimmington
They will try to kill you and you have to OSRS gold fight through shrub sprits (70) to get into the grand ent. Return to ivan and he wil use the spirit to build a wooden fence round the remainds of town. Next you've got to create a omega rune. Proceed into wizards tower to sedridor and he will tell you to create the omega rune you require 20k each basic elemental runes. Then he directs you into the nautical workshop.
Return to Osman and inform him you think you get a good disguise but you dont know how to get it. He will tell you to get some specimen of the person which should do the job. Return and kill the"Chief Servent." He doesn't have cured since you continue attacked him it shouldn't be difficult. Pick out the hair to osman and he will tell you there is a mage from the west who will transform you into somebody else.
Go to the makeover Mage just north-west of Rimmington and talk to him/her. Request him if they can turn you into someone else. They'll tell you they require a specimen of the person, three vials of water, and 1k to their services. Give them the items and they will create"Strange Potion." They will instruct you to drink this just when you have to impersonate the person as every potion gives 10 minutes of cheap RS gold stolen identity.