Don't know why your file is called boot.prv, and not the usual boot.ini
Anyway, your computer is still using the 2000 boot loader.
To revert to the 98 boot files, prepare a 98 boot floppy. Restart computer with it, and at the A:> prompt, type sys C: and press Enter. You should then get a message which says system transferred. Remove floppy and restart. It should go straight into 98.