[CentOS] Problems configuring SAMBA share on remote machine

[Andrew Allen]

I'm having problems getting a SAMBA share on a remote (Windows XP)
machine to allow me write access to files. I can copy/paste whole files
OK from my CentOS 5 box, but can't do any editing of files on the
Windows XP machine, which I use as a file server for most of my domestic
data (historical reasons for using Windows!). I've tried re-setting
permissions to allow write access to the cifs-mounted folders/files, but
without success - any suggestions please?

Thanks,
Andy