Reformatting windows partition, loosing grub?
I've got a machine in which there is one hard drive which is divided into two partitions. One (let's call it hda1) is an NTFS partition, on which there is a Windows XP, the other (hda5 if you will) is an ext2 partition on which I have an Ubuntu. There's a grub boot manager with which you can choose between the two upon booting. (The file bootgrub and boot.ini control this, I suppose, which are on hda1).
Now my problem is that I want to get rid of the Windows XP and reformat that partition as ext3 or whatever, to claim it completely for my Linux. However, since the boot manager resides on that partition, I don't know whether I'll be able to boot or how I will be able to do that afterwards. (I guess I'll have to install a Linux-based boot manager or something.)
Since I wouldn't like to spend whole weekends by figuring out how to get my Linux running again after reformatting the (I guess primary?) partition, I would be happy if someone could tell me what will happen and what I will have to do about it. I can only hope that by booting from the Ubuntu install dvd I'll be able to install some boot manager. Is that correct?
P.S.: Also, can someone tell me how to post into more than one group at the same time in order to avoid cross-posting?