@nevin:
I always recommend
manual partition.
well,boot into vi$ta,go to disk management(something),clear ur win partition which u want to install Ubuntu.
now boot into Ubuntu,select in partition screen,manual partn.
now select free space and make a partition of 8GB(if ur switching fully into Ubuntu) for "
/" and I think u got a new system as ur running vista.so,make a partition from that free space for
swap of type "swap" of around 1.5GB(for software suspend feature) if u dont mind.
swap is equivalent to window$ "pagefile.sys" .
now put a tick in the / and swap partitions.
My suggestion,
remove the entries for other partitions which the installer detects.ie,that where,it suggest automounting in /media/sdx directories.also make sure u dont have "tick"ed in other partitions except ur new / and swap.
see the screenshot for manual partitioning(recommended):
*digitalgraphy.files.wordpress.com/2007/10/manual_partition_ubuntu_dual_boot_.jpg
also,I found this below guide much easier:
*digitalgraphy.wordpress.com/tag/manual-partition/
PS:the ubuntu graphical installer is called ubiquity