Couple of questions here.
1. I'm hacking Fire Red, and my hack will have a new feature: space! I was wondering if it was possible using hex or ASM (are they the same thing?) to add a new HM, similar to the Dive HM in R/S/E. If not, there's an easier way to implement it, but not as cool. =\I think it's possible, as Fire Red was built on R/S and still has the HM as an item (I think)
2. Cell phone? Any way to put that in Fire Red? I don't need to be able to call anyone, they just have to be able to send you messages.Yeah, you can have that. If it's only for them to send you messages, easy. Just put script tiles and when you step on them get a message. :D
3.Empty tile spaces in the tilesets. Are they necessary? If not, can you edit them to have new tiles?Dpends on where they are. The ones at the very bottom, don't. Any others...well, I use them. :)
4.Does having a bloated ROM(i.e., not deleting old scripts)affect the gameplay at all or is it just good hacking practice to delete them? You don't evn have to delete them :\ Re-using something like the "Brock wants to challenge you" script is lazy, but reusing talking scripts is fine, as long as you text edit them.
5.Can you delete maps in Advance Map or do you have to rename them?
Why do you want to delete them? I'm not sure if there's a way...
6.Where can I find a list of all of the scripts in Kanto that have to do with the Sevii Islands? I need to get rid of them.
Why do you need to get rid of them? You can edit them, or leave them in, they don't take THAT much space.