@Nikhil What version of Ubuntu are u using? I have Feisty, I shared 256 MB Ram with a VM of Fedora 8,Its up and running, although my system performance goes considerably low.Here is a screenshot of my system on my blog http://mytrystwithlife.blogspot.com/.
VMware actually has almost the same issues as Virtual Box,Virtual Box is only easier to install and needs no configuration what so ever. As said earlier by another friend,you can use accelerator.If u are using Dapper,you can use LTS configuration. Thanks Saurabh
