It seems I had put the sectors and size from another dump for this dump by mistake.

All the checksums were ok. Here's the proper size info anyway.

--------------------------------
System: Sony PlayStation Portable
Media: UMD
Title: Jackass The Game (USA)
Languages: (En)
SERIAL: ULUS-10303
BARCODE: 8 55743 00111 7
Comments: Dumped w. filer6.0
Version: Original
MD5: dbb4611899037caff977f3c64b4a3511
SHA1: 2ddbda1ca4edd7e384a416f88eac4ac7eb931526
CRC32: 4b1bc8bf
EDONKEY: 9f7c267c0676953a7a8e7e443049fa0a
SECTORS: 885008
SIZE IN BYTES: (1,812,496,384 bytes)

SFOInfo
-------
SFO file: f:\PSP_GAME\PARAM.SFO
SFO Version: 1.1
BOOTABLE: 1
CATEGORY: UG
DISC_ID: ULUS10303
DISC_NUMBER: 1
DISC_TOTAL: 1
DISC_VERSION: 1.02
PARENTAL_LEVEL: 9
PSP_SYSTEM_VER: 3.51
REGION: 32768
TITLE: Jackass™: The Game

SFO file: f:\PSP_GAME\SYSDIR\UPDATE\PARAM.SFO
SFO Version: 1.1
BOOTABLE: 1
CATEGORY: MG
DISC_ID: MSTKUPDATE
DISC_VERSION: 1.00
PARENTAL_LEVEL: 1
REGION: 32768
TITLE: PSP™ Update ver 3.51
TITLE_0: PSP™ アップデート ver 3.51
TITLE_10: PSP™更新 版本 3.51
TITLE_11: PSP™升级 版本 3.51
TITLE_2: Mise à jour PSP™ ver. 3.51
TITLE_3: Actualización de PSP™ ver. 3.51
TITLE_4: PSP™-Aktualisierung Ver. 3.51
TITLE_5: Aggiornamento della PSP™
ver. 3.51
TITLE_6: PSP™-update versie 3.51
TITLE_7: Actualização PSP™ ver 3.51
TITLE_8: Обновление PSP™ вер. 3.51
TITLE_9: PSP™ 업데이트 버전 3.51
UPDATER_VER: 3.51

Hope this is ok tossEAC.