A search on Google or other search engine for "md5 check for windows free" will bring up a few prospects for you. One possible answer is at:
If you have gotten the file through a normal repository for file distribution you should have no trouble even if you do not do a checksum. However if you want to be sure, using MD5 is a good way to verify a file.
I may be asking for trouble, but I have burned many "distros" to CD and have never had a problem (although there is always a first...and last... time for anything). If the machine is mission critical or is not yours then definitely use checksum.
Also in your thread you mentioned that you did not know how to Install? I do not recognize the information referred to by Edmunds Enterprises, but most distributions will auto install to the selected drive / partition now, from within windows or if it is a "live" distribution it will boot from the CD. If you need more help please feel free to ask.