There are three files to download per quad:
xxxxxx.sdw
xxxxxx.sid
xxxxxx.txt

Click here for DRG's

Click here for DOQQ's
3290A1 STAR
3290A2 WHITES
3290A3 TERRY
3290A4 DABNEY CROSSROADS
3290A5 UTICA EAST
3290A6 UTICA WEST
3290A7 CARLISLE
3290A8 WILLOWS
3290B1 WHITFIELD
3290B2 FLORENCE
3290B3 NEW BYRAM
3290B4 TERRY NW
3290B5 LEARNED
3290B6 CAYUGA
3290B7 BIG BLACK
3290B8 YOKENA
3290C1 JACKSON SE
3290C2 JACKSON
3290C3 CLINTON
3290C4 RAYMOND
3290C5 EDWARDS
3290C6 BOVINA
3290C7 VICKSBURG EAST
3290C8 VICKSBURG WEST
3290D1 MADISON
3290D2 RIDGELAND
3290D3 POCAHONTAS
3290D4 BROWNSVILLE
3290D5 QUEENS HILL LAKE
3290D6 OAK RIDGE
3290D7 REDWOOD
3290D8 LONG LAKE
3290E1 CANTON
3290E2 CHARLTON
3290E3 FLORA
3290E4 COXS FERRY
3290E5 PHOENIX
3290E6 ELDORADO
3290E7 FLOWEREE
3290E8 CANE BAYOU
3290F1 WAY
3290F2 BERRYVILLE
3290F3 BENTONIA
3290F4 TINSLEY
3290F5 SATARTIA
3290F6 LUCRE
3290F7 VALLEY PARK
3290F8 ONWARD
3290G1 VAUGHAN
3290G2 LINWOOD
3290G3 BENTON
3290G4 YAZOO CITY
3290G5 BAYLAND SE
3290G6 HOLLY BLUFF
3290G7 RED ROCK
3290G8 CARY
3290H1 EBENEZER
3290H2 ZEIGLERVILLE
3290H3 EDEN
3290H4 CARTER
3290H5 LOUISE
3290H6 BAYLAND
3290H7 ROLLING FORK EAST
3290H8 ROLLING FORK WEST