Exploring Ubuntu: How to run Sify internet client on Ubuntu?

Very recently, in one of my old PCs, Windows crashed. I was left with only Windows XP SP1 bootable CD, which I got from HP when I bought my computer way back in 2003. And I had no office. Buying a new Windows and Office CD would be expensive to my pockets (if you are in India, you can appreciate that!). Moreover, my old PC hardware won't support Windows 7, even Office 2003 used to crawl in