yes, i was confusing your laptop with another model wit a older cpu
of course you can run kde4
the install proces takes around 12 minutes on my 1.6ghz single core desktop so 7 hours means that something failed and you waster 6 hours and 45 minutes
be sure to make backups before doing any partitions, accidental format of a partition is something possible here, try to create a / partition in ext4 and a swap, if you like you can have a /home partition, it is your decision
still, try the latest pclinux because 2009 is abandoned completely, download 2010.12