Help! Problem with foreign characters

Lucky me, been tasked with producing a load of translations into Polish.

Bear with me, this will take some explaining...

I normally deal in - and have no problem with - French, German, Dutch, Spanish, Portuguese, Norwegian, Finnish, Italian and Greek.

The system I used is a FoxPro-based system that has been written specially by a programmer who is conveniently out of action at the moment and won't be available until after the delivery deadline I have.

I have received an Excel file from the translator which displays all the characters correctly. However I can't paste these characters into the FoxPro database which is then used to run a huge find-and-replace on the original English document.

As I understand it, the FoxPro program uses codes for the accents, a string such as <@0248> represents a special character. The 0248 number is the same as the "Keystroke Number" shown to the bottom right of Windows character map. However, many of the characters I need to be able to input do not have a Keystroke Number.

For all the current characters I need to use, FoxPro accepts an input of the character itself (e.g.