by first in first served - if you want to change after systems boots for the first time just change in admin tools - computer manager - disk manager - then right click on the drive and select "change drive letter"
You may have to do a bit of swapping about eg to swap c with d do the following:-
Using win xp home, sp 2
1.33 gigahertz AMD Athlon
128 kilobyte primary memory cache
256 kilobyte secondary memory cache
Board: MICRO-STAR INTERNATIONAL CO., LTD MS-6738
Bus Clock: 133 megahertz
BIOS: Phoenix Technologies, LTD 6.00 PG 04/18/2003
I want to change existing HD with drives C & E, to drive D & F without reformatting or losing any existing data.
I will be removing a 10 gig hard drive, currently labeled drive D & F.
Installing a new WD 80 gig hard drive, which I will partition and format as drive C & E and do a new install of Win XP home.
When I change the jumpers from Primary to Slave, on original C drive, and the new HD jumpered as Primary, will the BIOS automatically change the slave HD from C & E, to D & F? (new HD will be plugged in at end of ribbon cable, and secondary will be plugged in to middle ribbon connector)