changing name on the passport

[galaxy]

Hello Every one,

I am currently on PSW visa which will expire on Dec 2012. My husband is on tier one general visa we got married in January 2011 and i came back uk with my husband with out changing my visa.... now we are planing to apply for dependent visa so i have few question regarding the changing name on passport

I have changed my name on National Id card from uk is this enough for dependent visa ? or need to change passport as well...but if i changed my passport from uk will my old visa canceled which is on current passport? if yes.... then do i need to transfer my PSW visa on new passport before traveling back to home country for dependent visa? what is the procedure to transfer visa on new passport. can we travel on that visa having on old passport but with new passport?

I would appreciate for any help
thanks