Is there a way to update LG GT540 without rooting?

[MeepskiB]

Hi,

I was just wondering if there's a way to update my LG GT540 without rooting it? I'd quite like to sell it before I get a new phone, and I know it doesn't sell for much, but it's a still a little towards a new one. But yeah, so is there a way to do it?

If not, is it worth rooting? What are the pros and cons?

Thanks in advance