I have been with Fedora for years but wanted to see how Ubuntu looked. Its great ;-) What I did was boot to a live CD then do a thumb install to a 4G drive and then use that on my laptop. I took the defaults. I got pretty familiar with it and installed eclipse, java etc but when I came to try apt-get kubuntu-kde4-desktop it borked near the end with a drive full error. So I fired up gparted and it shows /dev/sdb is split into 2 1.87G partitions, the first of type fat32, label=ubuntu8 and the second as type ext2, label casper+rw. When I focus on these on gparted the resize option remains greyed out. Am I right in thinking I should be able to resize this to use all the 4G, and if so how do I do it please? (I am not really familiar with gparted in case theres a howler I'm making). Thanks.

Try resizing your partitions from a live CD or from your Fedora install. GNU/Linux won't let you resize a running system that simply.