Search text files from within Access

I have a document log as Access 2000 database. Each record has a
corresponding pdf and txt file stored in the same folder as the
database. There is a hyperlink field that points to the corresponding
pdf - for record No. 10 this would be 010.pdf.
I need to be able to search the log by keyword. This is of course
easy within the database itself; however the log does not contain the
full text of the related document. Is there a way to, based on a
keyword entered in a form:
- open explorer search window;
- run the "words in file" type search;
- use the results in a query to pull up the matching files? (If I got
values like 010.txt and 014.txt from the search, could I query the
link field looking for [first three characters of results]&".pdf"?)

thanks in advance