Yeah nice one, it's not really a big deal changing the head, ECU and wiring loom, my brother and I did a 2.2 turbo conversion into his EK civic, that was a ball ache I tell you!
Me and him have had a chat about what you're trying to do with the EGR valve, using it as an ALS, and we're pretty sure it won't work properly, you could try pulling the timing a bit to force the turbo to spool in between shifts, forcing the fuel and air into the pistons.
I'm pretty sure that AEM do an anti lag system (I think it's called the EMS), but you'll have to change to coil packs. Give them a tinkle and see if they have anything that will suit your needs. If you need any more info or help mate, gve me a shout.
Good luck with the project!