[P3600 ROM Development] the.decoy:
Yeah, I know ... I just dumped that rom myself to test it.

Sorry but that ROM isn't dumpable. Too much metadata missing (RGU, DAT, DSM)

See here in the log from packagetool:

[Versions]
SYS: 5.2.21857 5066

[Packages]
5.2.21857 5066 MSXIPKernel
- busenum.dll is missing!
- cachefilt.dll is missing!
- certmod.dll is missing!
- coredll.dll is missing!
- crypt32.dll is missing!
- device.exe is missing!
- devmgr.dll is missing!
- diskcache.dll is missing!
- fatfsd.dll is missing!
- fatutil.dll is missing!
- filesys.exe is missing!
- fsdmgr.dll is missing!
- fsreplxfilt.dll is missing!
- imgfs.dll is missing!
- initvmmap.exe is missing!
- mencfilt.dll is missing!
- mspart.dll is missing!
- pm.dll is missing!
- regenum.dll is missing!
- 723fb954-d931-4348-b672-82a188e587b5.rgu is missing!
- boot_ms.rgu is missing!
- mxip_lang.vol is missing!
- sysroots.p7b is missing!
- cecompr.dll is missing!
- ceddk.dll is missing!
- FLASHDRV.DLL is missing!
- Fsdspy.dll is missing!
- nk.exe is missing!
- d77422c8-5418-29e9-1418-f4f65f1d6f60.rgu is missing!
- boot.hv is missing!
- boot.rgu is missing!
- buildx is missing!
- 8be73c02-3437-4c06-88c9-0a2e25bfaf2c.rgu is missing!
- 1dc3da02-499f-4547-9fd2-78cddfda9c62.rgu is missing!
- 8cb4ac12-6bc5-4bda-ab45-539988c36a95.rgu is missing!
- adc19413-37b2-4018-af8a-148b50f6ea13.rgu is missing!
- 6b4ed31c-5ced-41b2-b917-2c006f046a5e.rgu is missing!
- 29356830-10de-437d-ad6a-6c7d60a7dea4.rgu is missing!
- 27790533-c966-4097-8a93-c1a83969c574.rgu is missing!
- 0f48543b-7503-4466-8797-8508f5da20ed.rgu is missing!
- 8c58193c-f8ab-447a-af67-a5167df96529.rgu is missing!
- ae879543-c73e-4888-812b-d8177c404612.rgu is missing!
- e658c544-26bf-45ac-a458-2044a5d1e698.rgu is missing!
- 23ba5346-78b8-4436-b7d2-f30712c3cef4.rgu is missing!
- d13b7447-0248-462a-bba4-d868f31642ed.rgu is missing!
- 37bbb34e-3d43-40b3-bc03-97a3f1e0f568.rgu is missing!
- 77f38251-db87-4e5d-96d9-9e8e35b6dc1d.rgu is missing!
- 4c804658-f322-40fd-989c-1394560913fa.rgu is missing!
- 582f7a58-3c50-4301-970a-ed5ec8947692.rgu is missing!
- c4f85360-3c1d-4ace-8066-99d9056fa383.rgu is missing!
- 2f863e61-941d-4fb6-bcdf-35bf606e613a.rgu is missing!
- fc3a8673-312d-454d-b6e9-f5a3c326c312.rgu is missing!
- 429b237a-cc04-4166-a65b-5cd54a4f1b7d.rgu is missing!
- 76bd787c-86b5-4b63-a1d8-1a910f86c8e1.rgu is missing!
- 9bc37f7c-d720-4091-8cc6-93c0f1c9ef46.rgu is missing!
- c536797d-4a69-4e8c-9541-e46f3b4fdc08.rgu is missing!
- d7904a7e-6226-443b-8c8c-439683b0b55a.rgu is missing!
- a492bb92-210b-4933-9a65-272cc8ad9a5b.rgu is missing!
- e220df95-8031-49ff-b5c3-95c1c2809b74.rgu is missing!
- fd7ec796-412f-4352-9a71-04da841dc265.rgu is missing!
- 7a1dae98-d009-4bb0-9614-8f3274d966fe.rgu is missing!
- 38f43c9f-bc38-430e-81d1-a2e6c650f225.rgu is missing!
- 4aea04a6-7987-496d-abf6-47a54efa8e34.rgu is missing!
- 8037e9be-9156-4b1c-8df4-9305bb0bac76.rgu is missing!
- 0cfc3dc0-5fbc-4153-9ce9-72df4d8c2922.rgu is missing!
- ac83ddc2-9401-4c03-a46b-72b9d99ef2c9.rgu is missing!
- d8e6bedb-8bc3-4e94-ba7e-cc0a239b4f6a.rgu is missing!
- 64d374dd-96bf-409e-9a7e-95ac646ccbda.rgu is missing!
- d81b11e0-3299-4b65-8305-78f1fa03dc07.rgu is missing!
- d726fef1-c84d-40f5-9010-07a6a3fd70a7.rgu is missing!
- packages.cif is missing!
- c9b03c4a-50ff-4e86-b92f-2eb3f9968eb3.rgu is missing!
- ca1c6c4d-7cb5-45ea-ac35-6239806c1b25.rgu is missing!
- d0b41563-b345-4444-aa15-986e7c7fff99.rgu is missing!
- 9ca8818d-8eec-479d-a9be-81305c52d303.rgu is missing!
- b183f2a7-06c3-4f27-9679-7baf97e94efa.rgu is missing!
- 90f7cab5-db46-4341-b395-7aca3d47055c.rgu is missing!
- 29d83cd1-abf5-4903-8b3d-47ea40bc5688.rgu is missing!
- 27bd50e6-83b5-413f-a6d3-cdbbd079c326.rgu is missing!
- f65c1b88-2732-470a-88c8-de964e9f9ca7.rgu is missing!
- f50e9a40-aed9-497a-bdea-84451210e960.rgu is missing!
- f3dfc36d-36d0-4163-8d6f-e1ce5aed8814.rgu is missing!
- 331439cf-a636-4243-8424-e501be3a39d2.rgu is missing!
- 77ab73e4-2de4-4f4e-982f-47eedf0e9e1e.rgu is missing!
- 1f1aca24-d942-464a-9281-10567741499c.rgu is missing!
- 813fd1d1-ca6f-4b6d-96d2-c97fb99bd535.rgu is missing!
- d9d7d86d-3f83-4289-bd32-aa1972a1447e.rgu is missing!
- 855d4be3-261f-4d7b-8378-951b0ab78d77.rgu is missing!
- 208f8be6-1362-45b3-ae17-95d4ab426c11.rgu is missing!
- 2a6583ff-6047-46cc-b9be-b7deca1152c3.rgu is missing!
- 12e09329-dd44-4d62-a5b7-25124bb2ef88.rgu is missing!
- 25f4da29-9280-48e9-8f2e-28a91294ce74.rgu is missing!
- 9a6a05e1-cfde-4d32-9a82-85052c4d9de7.rgu is missing!
- 70bf28e9-b87c-4b43-be51-e804d08276b1.rgu is missing!
- 7bb5f499-6b7f-4ee0-bcb9-a89ae3fc3e2c.rgu is missing!
- 25c125d4-0a18-487d-a709-9b4242bbf4c3.rgu is missing!
- ba94b89b-3bb8-4f41-bada-121dbdab1fde.rgu is missing!
- ed0ab1a4-a456-4fb0-ad9d-93feccf351a3.rgu is missing!
- 52dcbada-7234-4ee7-b513-731176d5f860.rgu is missing!
- a15620ee-f541-454c-99d4-ee268d67e74a.rgu is missing!
- 15947029-6127-4062-bb7f-b3c8bed871ac.rgu is missing!
- cb274b02-a54d-4780-971e-b6c924548d95.rgu is missing!
- c86090f7-d736-4b04-9978-d5a2a8375db4.rgu is missing!
- 8b8d7a86-906e-43f9-9153-ee6a6d1ba69b.rgu is missing!
- 9c2b793b-abbf-43e7-b06b-606b2eaec187.rgu is missing!
- a284f006-c83e-44a6-b9f2-37e290c77c49.rgu is missing!
- 75f7ffff-afb2-4e66-ad65-2440f7601067.rgu is missing!
- 094c97f9-0101-450e-8282-97f619f929d5.rgu is missing!
- b6470185-39c6-4c9c-bb6e-aa5ca1afba42.rgu is missing!
- 0a0e4076-7ae8-4134-a2dd-47c1601150f4.rgu is missing!
- b56e70fa-c325-4ef9-9623-c86513a87b7b.rgu is missing!
- 8738a90b-2484-458a-9b3e-f3d52d6eb921.rgu is missing!
- fddbb131-87f7-4889-b53b-fe0cdec211b1.rgu is missing!
- 5560d686-977f-49b8-afb0-d2b870631891.rgu is missing!
- acebe602-ab3e-4f81-af2b-aac3b6e7fdac.rgu is missing!
- db3a7a5d-11e4-4fe8-aeda-86daa8a31dd6.rgu is missing!
- 4381df66-bd72-4810-8789-8c3c576b2417.rgu is missing!
- b3789109-8218-4e38-8698-e46041572102.rgu is missing!
- 7eecd4e2-c2fe-425c-b81c-699573073af2.rgu is missing!
- 7af02ee5-0954-488d-a9ce-d0d927ae27ae.rgu is missing!
- 5f0a8e6f-4f89-4b99-95f6-4559cb555001.rgu is missing!
- adb3cdef-61a5-4c1b-856c-1d7c79897a8d.rgu is missing!
- edc91b17-9d91-4d36-a4e0-664ba60055a1.rgu is missing!
- d2613edd-03c2-414c-a2c5-d0d3eab9fcf3.rgu is missing!
- 96c0754f-b183-4995-a657-0b7c0034ce80.rgu is missing!
- dfc4d371-880c-4c75-a92b-5db48b0ea57d.rgu is missing!
- 1fd41fc7-6d8e-4a4f-932f-31a9a0422728.rgu is missing!
- 3931193d-7c06-423e-8af0-40bea1341c39.rgu is missing!
- 62f81215-ff5b-4e8f-a26f-a8efce401745.rgu is missing!
- 81e079ba-67da-4514-842a-145c18d6d71d.rgu is missing!
- 5f7cdb45-7006-4bd4-ad84-f6d5e586b2ac.rgu is missing!
- 8e538198-7214-4cd5-93d2-60be04bd1aa5.rgu is missing!
- 1300ae40-01a8-4685-9ee8-d4ed5b112eab.rgu is missing!
- 8372389c-f0b6-433d-934b-ecd80b5bfc30.rgu is missing!
- 8f72dde9-155d-4c0e-ac66-830af991ee26.rgu is missing!
- a561acc8-7e63-4098-b87c-ce1410625c4e.rgu is missing!
- 1c90ed23-74b0-480f-b0ca-63ddcb8a8522.rgu is missing!
- 482286ba-c706-48fa-b779-063202e5fadd.rgu is missing!
- C33C0922-BE67-48da-870E-27DD8A021BD9.rgu is missing!
- d196378a-88eb-4c8a-b1a9-703af085e4bd.rgu is missing!
- a02d9857-e048-4528-b351-78634520c066.rgu is missing!
- fdcee474-d38a-4b6d-903c-e848d2ea6575.rgu is missing!
- 02ed2b85-c80b-4413-a1b9-7abdade426f1.rgu is missing!
- 79f39fdf-b4cc-4d6e-9634-c836052ae50e.rgu is missing!
- f8502497-c25a-45ba-a0c9-e739334b0414.rgu is missing!
- 63c9633a-bfd2-46a2-b7d3-0fb8f9b9078a.rgu is missing!
- 9eaf602b-b5d8-4f23-9cc6-6d4b85740dba.rgu is missing!
- 5f268760-e815-4e09-be38-f216b1df148b.rgu is missing!
- b60b3ce5-85e3-4ef7-9143-d8f5aa82042f.rgu is missing!
- 38095bf1-656f-42cd-bea1-31cbcddb001f.rgu is missing!
- daa0f3ca-16af-4992-91a8-666890ed0a87.rgu is missing!
- 9b6eadca-b850-425d-9add-af3a3ff7c5b5.rgu is missing!
- initflashfiles.txt is missing!
- cbcd0684-9d4d-4a3a-9373-c1f44230580b.rgu is missing!
- 0c433710-0016-4302-ab2f-497863b761ae.rgu is missing!
- 4e0fc1df-825f-4061-b06d-52276a32a908.rgu is missing!
- initflashfiles.txt is missing!
- c14fe310-fbf1-4aab-93e6-bbecaf71dba6.rgu is missing!
- 6938b843-e7d9-460e-9898-8b734353a717.rgu is missing!
- 7674f4a5-ad32-4618-8105-f2822e065e4d.rgu is missing!
- 47d2a96e-f0dd-40e1-8f5b-a8cdc083a165.rgu is missing!
- 8412a067-4fc6-457f-a67a-bb87f117f64c.rgu is missing!
- 377c9c66-ea26-4076-8667-0ee76710684d.rgu is missing!
- 4de80f06-7f01-45e5-b893-b0a97a0a768b.rgu is missing!
- 822f2deb-a393-4a39-b5f0-147201bd0b0a.rgu is missing!
- c884a44b-1230-436e-8a0e-94a46847cdcb.rgu is missing!
- initflashfiles.txt is missing!
- voicetag.bmp is missing!

Most of the other files are there so if you want his ringtones, images or to gleam some setup hints from his provxml files you can :)

But this is my point. Only official roms are intended to be dumped. For cooked roms you need the chef to give you their kitchen.