About Nokia5700 XpressMusic

Hello,I bought my 5700 last year and I also purchased a 2GB memory
card as its said that it supports.

However, I just heard the news that actually 5700 could hold 4GB as
well, I called the careline, they just read those words they put on
website and nothing factual from real test.

So, If someone has tested 4GB memory card on your 5700 yourself, would
you please tell me as I dont know if I should go for a 4GB card.

And my 2nd question is: FAT and FAT32, which works better with S60 3rd
version system?

Please, dont paste any thing from pages from google, I did it before.
All I need is some real experience on one's own.

Thank you very much..