dual boot - gentoo on a winxp machine

I recently installed gentoo on a HP machine running win xp. The gui installer that comes with LiveCD is actually pretty easy to use. You first need to burn the iso image of LiveCD:

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Now the problem is the disk paritioning part of the GTK installer. If you try the recommended partitioning, it fails. The reason being my xp is already using up 2 primary paritions. This leaves only 2 more paritions as MBR allows a total of 4 partition. You cannot create the extended paritions using this gui.

The workaround is to use fdisk/cfdisk to create the extended partition. (1) Create one (ext2) partition of ~100MB for boot. (2) Create an extended paritition. (3) Create a logical paritition for swap (change type using t) of about 2*ram-size. (4) Create a logical paritition (of ext2) for the rest of space. You will specify the sizes using the starting sector and +SizeMB.

Further, you will need to set up the filesystem on these parititions. Otherwise, the GTK installer does not recognize the paritition type created from fdisk.

Next, you should not forget to mention the mount points in GTK gui.

Another reason why your installation might crash is because of inappropriate selection of additional packages to install. Many of the packages need to be downloaded from internet. Some of which will fail to download. There are still others that require you to accept licences, etc. So be careful in selecting the packages to install.

The major problem was with GTK not allowing to create extended parition I guess. Rest of it were minor issues.

My laptop seems to be already using all 4 entries. I wonder how I would set up dual boot there.