I'm not a windows expert but once you've sorted out the boot problems I'd suggest downloading Systemrescue and ripping it to a cd as a live iso. You can then use the live cd (you may need to change the boot order in the bios to do this so that your dvd boots before your hard-drive) to make use of gparted. This lovely piece of software will enable you to claim back your linux partitions and make them NTFS that windows can see and use. Please make sure that you back up your files first though so that the chance of data loss is minimized.
Here is a link for systemrescue: http://www.sysresccd.org/SystemRescueCd_Homepage
This link provides all the instructions on how to burn the iso and use Gparted as well as all the other interesting aspects of this useful distro and I'd recommend it as highly useful even to a hard-core Windows user.