Well it`s a bit hard to explain I think. So I found a DAT file which looks in folder for the things this is just a small list from this file

clrmamepro (
name "MAME Extras v0.96"
description "MAME Extras v0.96"
category "Standard DatFile"
version 0.96
author "NoOne"
comment "Complete MAME Extras"
forcezipping unzip
)

game (
name artwork
description "artwork"
rom ( name 1942.zip size 676429 crc 0xbfbe44dd sha1 0x0443d9173c01c4f78d211e41efd49b9bc64f4c1a )
rom ( name 1943.zip size 1056181 crc 0x1b963332 sha1 0x23ae721c76f273cc83a918e2f19717e7267f58c6 )

.... and so on

CLRMAME searches in the correct folders in this DAT file(ex. c:\EXTRA as Rom-Path. When I scan it looks in the Artwork folder for the correct files.

When I create a DAT file it looks like this

clrmamepro (
name ""
description ""
category "Standard DatFile"
version ""
author ""
comment ""
)

game (
name Default
description "Default"
rom ( name CDDB.DAT size 3505 crc 0x59f165b8 md5 0x4eed026e03740b5a1130e645df4edcef sha1 0x960a02468aa45cc5869991b90329bb14953517a0 )
rom ( name CDQUEUE.DAT size 2442 crc 0xd341dff1 md5 0x8f726cb9e6c8de60db5892d9804a07f4 sha1 0xd763a75c32b676837486780435fdb9dfda06e992 )
rom ( name EAC.exe size 2754048 crc 0x397551cb md5 0xae144904cd11add54a94ac392b391c77 sha1 0x4abed539ff1f61f268ceb6e828b0e7a8470b315f )
rom ( name ENCQUEUE.DAT size 4 crc 0x2144df1c md5 0xf1d3ff8443297732862df21dc4e57262 sha1 0x9069ca78e7450a285173431b3e52c5c25299e473 )
rom ( name lame_enc.dll size 166912 crc 0xbfd8d05f md5 0x01e669e26817f62bef78fc94453d37ff sha1 0x4ae29f79f203072c6f2977d566e2ecd3871caf84 )
rom ( name Legal.rtf size 10221 crc 0x69d999a3 md5 0xcfc18fdc3a13520ce17d3c3680e569b3 sha1 0x55e6df59775d636feae3f5dab16df080d2833552 )
rom ( name News.rtf size 13094 crc 0x3398f375 md5 0xa958d3c9a26578beedc0114c840cecfc sha1 0x543790b0899e95fe3bc74c9d46da6f48842ac63b )
rom ( name ShowInfo.exe size 14336 crc 0xf35d7294 md5 0xe0698b777d6afb23f2142a1e147166c9 sha1 0x512d254f786a81cf56f7400432f4ec1166694093 )
rom ( name WME9.vbs size 111099 crc 0x0c6eec4a md5 0xae98fd4e4f24f29a17efb2c452166edf sha1 0x276f05c6336357531cd52ca4e4e2fe51b2e17d62 )
)

game (
name Documentation
description "Documentation"
rebuildto Documentation
rom ( name EAC.txt size 62842 crc 0x7b861aed md5 0x0fd3ca8d05750fedc5269f2a074d06ff sha1 0x40612fddc2e25967b31e62617aa36af3e3b38918 )
rom ( name FAQ.txt size 44530 crc 0x703245c8 md5 0x3590cd0fea6cf6643c8f9f475213d7b5 sha1 0x07bb571890fadba12d2446ca11872a858f4e5da4 )
rom ( name WhatsNew.txt size 74612 crc 0xb78abfc2 md5 0x74f8f255da02cb7e52bd4b794a123ccf sha1 0x796ce1b10feabb2ba95ce11a50687c40c651bbf3 )
)

game (
name Languages
description "Languages"
rebuildto Languages
rom ( name Czech.txt size 141833 crc 0xefb80515 md5 0x119d2a7aa34249e910f9537c010def04 sha1 0x3f8d4632ef6f67f38a763f3e2627b7336b04ee18 )
rom ( name Dutch.txt size 155574 crc 0xb14c4983 md5 0x16c3839612577fb3013887e32bad87f5 sha1 0xf9d3bfbde4f2df833518ba9e965f1e2b651977cf )
rom ( name English.txt size 144324 crc 0x0bafb268 md5 0x763d07a439b4e21bbf2bb8fd41aebc2f sha1 0xf901f35444462c765e397718fcc270384b5f0e51 )
rom ( name French.txt size 153912 crc 0x28b2aa43 md5 0xe8293fbaeb281604771c3fffe765afc9 sha1 0xd15df6664d6c7784a71e84d15499d86797e03c49 )
rom ( name German.txt size 161224 crc 0x26ab9139 md5 0xc433a73d965e82311ccc5352fcff115c sha1 0x218c2a0ff072d502ee4f889aa18ccd1262bd2acb )
rom ( name Hungarian.txt size 146135 crc 0x4bd8ee9a md5 0xc1c377d0dfcf848cccaa771a8dd54faa sha1 0xf2fd032cb74ac1144bd65f5609dac02f962db581 )
rom ( name Italian.txt size 165256 crc 0xfb1b2b38 md5 0x82dd1b12bf33b8d81e842eee9432c827 sha1 0x77dc612c6bbce0722c80b4cb3d5f82b3c5a7065e )
rom ( name Norwegian.txt size 147195 crc 0x6f07281f md5 0x9681c5d83601a6e166253c77f0d45e73 sha1 0x45ee19c91d5652ea625548b18c7d3c57fd22f74b )
rom ( name Polish.txt size 150927 crc 0xdef86f4f md5 0x7161b5416be5f047e2b3de0b70ee01b3 sha1 0xddfbd41fda4a1a680bd53c5397d184e3803bf5fd )
rom ( name Portuguese-BR.txt size 152291 crc 0x36fcbd66 md5 0x231e1e41678e87d764abbecbf7055124 sha1 0x6484464d22c6cf55667907832868f3d7a4c8be7c )
rom ( name Portuguese.txt size 153081 crc 0xfc31b97c md5 0x6d2ccec80636a42096975f5dda43d3bb sha1 0x34c6050f4f1393fd83257d938c8fafc15ffb4362 )
rom ( name Russian.txt size 147862 crc 0x373264e9 md5 0x3e0fb028d8aee6a725e75f7c56911d60 sha1 0xa208d841a855cfde6170d30af95870a23672ba33 )
rom ( name SChinese.txt size 112433 crc 0xe44b4da6 md5 0xb023ea2dbb13cdf7842b89c66293ec17 sha1 0xc8ed96f7edcc9209adb969c76100deba6922c224 )
rom ( name Slovak.txt size 148270 crc 0xeadba6d0 md5 0x06ac9ead64e735ed2654608841800700 sha1 0x475beb9d26ddef8c35cb9f74e28930e6163907e4 )
rom ( name Swedish.txt size 148541 crc 0x2db2bc30 md5 0x5c5e1ed581f7c22aed1971ca087d3c6e sha1 0xf601bf9c17ecd2acfe85a12d69e629649e68888d )
rom ( name Taiwan.txt size 113563 crc 0x90920c47 md5 0x1ddd68b69d5f2f87520456027a7b84b6 sha1 0x6c7005d5cda1872d52571d09237db19a817ba83b )
)

There it would rebuild all files to the correct folder but won`t search/check via the scanner in that folder.

Is there something I do wrong or is this somekind of handmade DAT???