OK so you have a mysql database that you have recovered from a backup. However, whereas you would normally have a nice sql dump to deal with, on this occasion you only have the .frm .MYI and .MYD files. Can you rescue that table the client has deleted? Indeed you can!
#> cd [where you databases are kept, possibly /var/lib/mysql ] #> mkdir [name of database to rescue] copy the .frm .MYI and .MYD files into it.
make sure the permissions are ok. Something like this
#> chown -R mysql:mysql [dbname] #> chmod -R 700 [dbname]
Now if you are lucky, you should be able to do this:-
#> mysql -u root databasename -e "SHOW TABLES;"; #> mysqldump -u root databasename tablename