This is a guide to access your Linux partitions (ext2 or ext3) from your windows Vista, if you are using XP read this.
First Download the FS-Driver from its webpage.
Then double click on the installer and click on run.
Allow it to run.
Follow the next screens as shown below.
Accept the license
Enable large file suppport
Select a letter for your extX drive
And now reboot your Vista and you are done.
Thanks to Jakob, we have this other option now:
ext2fsd, I have not tried it, so please post your experiences about it.