i have installed sql2k program to c: drive and database to f: drive. however, after changing the drive letter from f: to g: i am not able to start sql server service anymore. It seems like sql2k is looking for f: drive.
I suspect that it is having some major issues trying to start any databases stored on f:/g: drive. Have a look in your errorlog file to find the problem. I have a feeling that you may have to rename your G: back to F: to start it. Then go through and move your db's manually. It might get messy though.
If you installed the data to the F:\ drive, then SQL server is looking for the master database there. You will have to start up the MSSQLServer service with the flags for the new location of the master database files. According to BOL, the switches are -d (path to master.mdf) and -l (path to mastlog.ldf). Most likely, you will end up with all of the user dbs coming up as suspect, but you should be able to re-attach them after a little playing around with paths. Good luck.
Oh, if you can get the F:\ drive back, you will save yourself an awful lot of headaches.