Did exactly that, it worked.
This pack is drawing me in anyways, I want to keep playing, so I guess I will.
Edit: After having an established base, I was savaged by spiders that camped me. They were invulnerable. Regenned hp to max after every hit. Are you fucking kidding me?
Sorry, been offline for a few days. The Create New Game function will always make the Ice Plains. Its not a fault, its designed that way. To have multiple world creations I would have to include a new mod to allow it. I've already tried it and it had some drawbacks so I decided not to include it. I may re-visit the possibility further down the track but at the moment my focus has been to get the 1.5.0 update up and running.
As for invulnerable spiders, they' weren't included in the pack. The only thing I can think of is they could be mother spiders which regenerate health so need to be dispatched faster to avoid this. You'll easily recognise them, they have purple colouring on their heads and spawn a number of baby spiders when killed. Hungry spiders also regenerate health..
As for spiders that shoot at you. They're a pain but a ranged weapon will take care of them, assuming you have one of course. apart from that, early game, I'm inclined to dig out a base 2 blocks deep, place slabs on the floor and more slabs half a block above ground level. Make it at least 7 x 7 to give yourself ample room to stop creepers sensing you and blowing the whole thing apart. If you place sand around the edge, only spiders can climb onto it. Then its a simple matter of removing a ceiling slab to take them down in relative safety.
Of course you just might get a visit from a friendly shooting mini spider that is able to get into your base anyway. Then you get to become the prey.
Glad to hear you didn't give up on account of those dastardly spiders.