You can create your own include and set the DTMs as string constants. Something like:
Simba Code:
const
DTM_1 = 'acbcbef13728319diwudgiwf02y82r3';
DTM_2 = 'iuoc3f3gwfiwuf782g3fugeuaigcf83gf2';
//etc...
Which you can then call in your script as long as you've got it included at the top:
Simba Code:
program new;
{$I SRL/SRL/Misc/DTMInclude.Simba}
// ^ Wherever it's located
procedure Whatever;
var
DTM: Integer;
begin
DTM := DTMFromString(DTM_1);
FreeDTM(DTM);
end;
There might be a tutorial on creating your own include; I'll edit this if I find one 
EDIT: Found two!
Creating Your VERY Own Includes! by Daniel
Making your OWN includes! by Rich