There is nowhere to download V5 (it's way too big). It was a CD-ROM
installation. If you registered it, you could try contacting Corel Customer
Service to see if you can get replacement disks.
Alternatively, you could consult the V7/V8 newsgroups for assistance on the
conversion. (Worst case: I bet someone would convert if for you for a price!)
Hope that helps!
-- Eric
[C_TECH Volunteer]