Hi Po
The important thing to know is where they were before you did the System Restore. If they were within the My Documents folder then they should still be there. System Restore does not alter that folder or its contents.
You could download File Recover and see if it finds anything.
A lot rests on you remembering what the file names were.
downside
Thanks for your continuing patience--The photos were all in the Picassa 2 programme, put there many weeks BEFORE the dreaded 'system restore' i did, after which they vanished.
Logically they should still be in Picassa [i think]
I even entered a Picassa 'help' forum seeking advice but although 2 people kindly replied, they were far too technical for me to understand

Where you mentioned file 'names' i assumed wrongly i now realise, that it referred to the album titles of the photos in Picassa!!
A thought---all the missing photos had been originally uploaded into Picassa straight from my camera. The i file i 'recovered' after a search had also been uploaded to Picassa in the same way---which begs the question---if none of the missing photos had been held in 'My documents' originally, how come only one single recovered file was found??
Poli.
p.s i'm confusing us both now.