Help for a thick'ie please

hi all

wow! how much info is their to read - wonder if i can cut a few corners and get advise from people who know please

i looking for a cheap portable option for my car
i do have a good sony clie i dont use which has a fab colour screen - for sure it has IR not sure about bloo tooth but does have a memory stick

just want to be able to use it for voice navigation when im out so would using this be the best option?

sorry i realise there are prob 1,000 answers to my issue

kind regards

nuxes