I am not familiar with C64 dreams, and not sure if I understand exactly what you mean here, but the roms need to be named the same as the text in quotes between game name in the XML. 2AEC8D1B, the code you mentioned, seems to be the CRC of the rom, which has no real value for the game to load in HS.
<game name="Body Slam (Europe)" index="" image="">
<description>Body Slam (Europe)</description>
<manufacturer>Firebird</manufacturer>
<cloneof/>
<crc>81197E3B</crc>
<year>1988</year>
<genre>Sports/Wrestling</genre>
<rating>HSRS - GA (General Audience)</rating>
<enabled>Yes</enabled>
