OK let me 'splain...
I have HL with the full d20 and M&M datasets.
I have been working on creating a sci-fi/Traveller setting using M&M rules and would like to set up HL to work for this by heavily modifying the M&M dataset by adding/modifying/deleting skills, vehicles, weapons, etc.
When I am finished I want only the setting specific items to be available when creating characters for that setting.
But I also want to keep the original M&M dataset intact for use in superhero games.
Before I totally screw up any data files I have now I thought I'd get some input in how to go about this.
Do I simply copy the 'mutants' subfolder in the 'data' folder into a new subfolder...'M&MTraveller'?
If yes, then how do I select this when starting up HL? Will a fourth game-system option be automatically available to select (currently d20, M&M, WoD are avail at start-up)?
Thanks in advance for any help!

I have HL with the full d20 and M&M datasets.
I have been working on creating a sci-fi/Traveller setting using M&M rules and would like to set up HL to work for this by heavily modifying the M&M dataset by adding/modifying/deleting skills, vehicles, weapons, etc.
When I am finished I want only the setting specific items to be available when creating characters for that setting.
But I also want to keep the original M&M dataset intact for use in superhero games.
Before I totally screw up any data files I have now I thought I'd get some input in how to go about this.
Do I simply copy the 'mutants' subfolder in the 'data' folder into a new subfolder...'M&MTraveller'?
If yes, then how do I select this when starting up HL? Will a fourth game-system option be automatically available to select (currently d20, M&M, WoD are avail at start-up)?
Thanks in advance for any help!