dual boot

I have a XP machine that I have created a partition on using partition magic.
Firstly will this be ok for me to install a copy of 98 on?? Will the install see the partition?
secondly I have seen somewhere that this isn’t as straight forward as booting from the CD and selecting the drive to install on.
Think it was to create start up disks and a file and then do a repair on XP to create the boot up menu?

Can anyone help here??