Can I download & run IE5 with IE6?

I am having a major problem with spyware or something on IE6 which the folks in the spyware forum are trying to help me with. However, there is one business program I need to access for which I must use IE (which I can't presently use). So I was wondering if I could download the older IE5 and use it only to access this one site - not to browse. Can I run IE5 & IE6 on same computer? If I can, do you know where I could download IE5?

I am running upgrade version of XP Home (upgraded from ME).

Thanks,
Susan