I have photoImpression 4 (not for myself you understand but my boys (9 & 6!) like messing around with it!).
Presumably you no longer have the original programme on CD. It would appear to be still available from Arcsoft for $30! click here
Presumably though you have already paid for this, so perhaps an e-mail to the company explaining your situation (and telling them what a wonderful product it is!), may produce the required result!