Cid: Yeah, in version 0.2a seems like it's not a self-bootable game, but in version 0.25a it actually boots, i understand for "bootable" a game that show the sega logo and them it plays, if the game shows you the BIOS it's NOT bootable. On this case, my copy shows the SEGA logo, then it just stays there, and nothing happend later... just stays in the sega logo.
I tried with exoskeletor program, and everything goes fine, it creates the new CD and CDI image.. i can mount it on daemon tools, boot the orignal copy and the repacked one, and both of them shows the same problem.... just stay on the SEGA logo
After that i tried the repack procedure on other 3 games that I downloaded, to make sure that I'm doing the thing the right way, and all of them played well, with the nice side effect of having a smaller size on my hard disk

by removing the dummy files, and all of them played fine after the repacking procedure...
I think it's my 1st_read.bin file, must be corrupted or something... I don't know, I don't think that the image could be corrupted, cause if it were corrupted I wouldn't be able to extract it from the RAR file. Also, when I copy with explorer or MS-DOS the files on the CDI image to the hard disk, all of them copy well, no "Cycle-redundancy error" like on bad dumped images.
Maybe somebody has the same copy that I downloaded, and figured out how to make it work, the unmodified CDI image with the dummy file on it has a CD label which read "GONZO", the size of this 1ST_READ.BIN file is 1,539,136 bytes and the CRC32 of this file is "1AE4F01B", the size of the CDI image on the hard disk is 769,675,483 bytes.