You won't find FP Express availble for download from Microsoft now. You can grab a copy here:
http://www.monkeybutler.com/FPE/FPinstall.exe
for the next few days.
This is on my website hosted by Go Daddy. I think the last one I set up cost $50-$60 for a domain name and a years hosting.
If you want free shopping cart software try:
http://www.vpasp.com/
I set up this test site for a custonmer in no time:
http://www.kaufmancatalog.com
Any questions, please ask.