Here's the entries found in my Nebula DAT: System: NEO
RomName: mslugx
Game: Metal Slug X: Super Vehicle-001
[Program]
250-p1.bin,0,100000,81F1F60B,0
250-p2.bin,100000,400000,1FDA2E12,0
[Text]
250-s1.bin,0,20000,FB6F441D,0
[Z80]
250-m1.bin,0,20000,FD42A842,0
[Samples]
250-v1.bin,0,400000,C79EDE73,0
250-v2.bin,400000,400000,EA9AABE1,0
250-v3.bin,800000,200000,2CA65102,0
[Graphics]
250-c1.bin,0,800000,9A52C6F,0
250-c2.bin,1,800000,31679821,0
250-c3.bin,1000000,800000,FD602019,0
250-c4.bin,1000001,800000,31354513,0
250-c5.bin,2000000,800000,A4B56124,0
250-c6.bin,2000001,800000,83E3E69D,0
[System]
CartridgeID: 250
GfxCrypt: 0
GfxKey: 0
ButLayout: 9
Fix: 4
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Do note that just changing the filenames might not work and you'd need a Loader in that case. I think kawaks uses the same DAT.