Installation of Add On collection Problem

I have just replaced a dead hard drive that had MC14 020 installed on it, the entire Add-On Collection for MC14. This collection came on a CD in a zip file. Extracting it gives you .exe files for all the different extension packs and libaries. However, I cannot install any of these successfully. I run the exe file, only to get a box that shows that a "network source is unavailable" and it tries to point to a .msi file. I don't have an .msi file. All I have are exe files. For example: run Mathcad14_CE_Library_setup.exe results in a dialog box asking for the following file: Mathcad Civil Engineering Library.msi What am I doing wrong? I have had these installed before, but I can't seem to remember the trick to doing this. Please help or point me to a post that does (I couldn't find one myself). Thanks.