Where can I find the free student version of PSPICE?
It has been my experiance that you should always use some sort of a download manager when attempting to download even smaller packages from different ISV's. There are many good (free) ones available. I happen to like "orbit" (http://www.orbitdownloader.com), which integrates nicely with firefox as well as IE, and can overlap downloads by splitting it into several segments which are downloaded in parallel, which speeds up the transfers over lower latency links.
And while it may not apply to the demo version mentioined here, when accessing production releases of cadence software, always make sure you are pointed at the "closest" server, since there are several worldwide mirrors available.
Scott