Complex sentence: Arveladze joined Rangers from Ajax for £2 million in 2001, and was part of the squad that won the domestic treble in 2002--03 and the double in 2004--05.
Split into simpler sentences: Arveladze joined Rangers from Ajax for £2 million in 2001. He was part of the squad that won the domestic treble in 2002--03 and the double in 2004--05.