Here's one that might be funny/relaxing/useful/stupid/whatever/... :-)
Unlimited mines:
F2 4E 4E 51 -> F2 4E 4E 02
You have to get one first though, since mines are so abundant, I didn't look into setting it at 1 from the start, by the time you could possibly need more than 1, you probably already have a bunch. So, if you get 1 nuke, you can basically keep on nuking, or if you prefer even less action, you can just set up those tesla coil thingies and watch the carnage.
Edit: some more, just for fun
Unlimited gun ammo everywhere:
DE 4E 51 -> DE 4E 02
Unlimited tesla mine charges:
1D 96 04 00 08 00 08 00 1C 51 -> 1D 96 04 00 08 00 08 00 1C 02
Start each level with requested weapon (if random weapon active):
Change bold to weapon you want, no higher than 5, 3 is tesla.
21 00 96 0a 00 07 02 00 00 00 07 06 00 00 00 30 - > 21 00 96 0a 00 07 02 00 00 00 07 03 00 00 00 02
Apparently drops aren't quite as nice as I'd imagined so:
Exploding mines are now teslas too:
(If you've got no love for bear-traps, you can change them into teslas easily too, by marking to bolded number with a 10 instead of 11 and searching for that instead, changing it into 12 will make it tesla)
96 08 00 07 02 00 00 00 09 11 01 -> 96 08 00 07 02 00 00 00 09 12 01
EDIT: Planting too many teslas with unlimited charge will probably mean you won't be able to die in survival mode, you can still save and quit, I believe it still submits the last wave's data.